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Finding the Fourth Proportional to 338,737.96, 508,107.15 and 86,037.40

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Solution

The fourth proportional to 338,737.96, 508,107.15 and 86,037.40 is: 129,056.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,737.96 : 508,107.15 = 86,037.40 : x
  2. Step 2: Convert to fraction form
    338,737.96/508,107.15 = 86,037.40/x
  3. Step 3: Cross multiply
    338,737.96x = 508,107.15 × 86,037.40
  4. Step 4: Simplify right side
    338,737.96x = 43,716,218,107.41
  5. Step 5: Solve for x
    x = 43,716,218,107.41/338,737.96
  6. Step 6: Final answer
    x = 129,056.15

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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.