Home / 138,677,151.20-191,370,805.81-79,137,380.16

Finding the Fourth Proportional to 138,677,151.20, 191,370,805.81 and 79,137,380.16

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Solution

The fourth proportional to 138,677,151.20, 191,370,805.81 and 79,137,380.16 is: 109,207,494.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,677,151.20 : 191,370,805.81 = 79,137,380.16 : x
  2. Step 2: Convert to fraction form
    138,677,151.20/191,370,805.81 = 79,137,380.16/x
  3. Step 3: Cross multiply
    138,677,151.20x = 191,370,805.81 × 79,137,380.16
  4. Step 4: Simplify right side
    138,677,151.20x = 15,144,584,210,713,662
  5. Step 5: Solve for x
    x = 15,144,584,210,713,662/138,677,151.20
  6. Step 6: Final answer
    x = 109,207,494.39

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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.