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Finding the Fourth Proportional to 338,839.08, 508,255.71 and 86,120.29

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Solution

The fourth proportional to 338,839.08, 508,255.71 and 86,120.29 is: 129,179.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,839.08 : 508,255.71 = 86,120.29 : x
  2. Step 2: Convert to fraction form
    338,839.08/508,255.71 = 86,120.29/x
  3. Step 3: Cross multiply
    338,839.08x = 508,255.71 × 86,120.29
  4. Step 4: Simplify right side
    338,839.08x = 43,771,129,139.36
  5. Step 5: Solve for x
    x = 43,771,129,139.36/338,839.08
  6. Step 6: Final answer
    x = 129,179.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.