Home / 100,293.12-138,401.52-54,970.10

Finding the Fourth Proportional to 100,293.12, 138,401.52 and 54,970.10

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Solution

The fourth proportional to 100,293.12, 138,401.52 and 54,970.10 is: 75,857.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,293.12 : 138,401.52 = 54,970.10 : x
  2. Step 2: Convert to fraction form
    100,293.12/138,401.52 = 54,970.10/x
  3. Step 3: Cross multiply
    100,293.12x = 138,401.52 × 54,970.10
  4. Step 4: Simplify right side
    100,293.12x = 7,607,945,394.55
  5. Step 5: Solve for x
    x = 7,607,945,394.55/100,293.12
  6. Step 6: Final answer
    x = 75,857.10

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1.5x scale

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.