Home / 138,787,262,571.90-191,455,934,819.95-90,643,486,955.10

Finding the Fourth Proportional to 138,787,262,571.90, 191,455,934,819.95 and 90,643,486,955.10

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Solution

The fourth proportional to 138,787,262,571.90, 191,455,934,819.95 and 90,643,486,955.10 is: 125,041,975,817.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,787,262,571.90 : 191,455,934,819.95 = 90,643,486,955.10 : x
  2. Step 2: Convert to fraction form
    138,787,262,571.90/191,455,934,819.95 = 90,643,486,955.10/x
  3. Step 3: Cross multiply
    138,787,262,571.90x = 191,455,934,819.95 × 90,643,486,955.10
  4. Step 4: Simplify right side
    138,787,262,571.90x = 17,354,233,530,327,658,135,552
  5. Step 5: Solve for x
    x = 17,354,233,530,327,658,135,552/138,787,262,571.90
  6. Step 6: Final answer
    x = 125,041,975,817.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.