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Finding the Fourth Proportional to 338,744.24, 508,116.56 and 86,043.68

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Solution

The fourth proportional to 338,744.24, 508,116.56 and 86,043.68 is: 129,065.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,744.24 : 508,116.56 = 86,043.68 : x
  2. Step 2: Convert to fraction form
    338,744.24/508,116.56 = 86,043.68/x
  3. Step 3: Cross multiply
    338,744.24x = 508,116.56 × 86,043.68
  4. Step 4: Simplify right side
    338,744.24x = 43,720,218,691.34
  5. Step 5: Solve for x
    x = 43,720,218,691.34/338,744.24
  6. Step 6: Final answer
    x = 129,065.57

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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.