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Finding the Fourth Proportional to 173,428, 239,330.64 and 93,940

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Solution

The fourth proportional to 173,428, 239,330.64 and 93,940 is: 129,637.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,428 : 239,330.64 = 93,940 : x
  2. Step 2: Convert to fraction form
    173,428/239,330.64 = 93,940/x
  3. Step 3: Cross multiply
    173,428x = 239,330.64 × 93,940
  4. Step 4: Simplify right side
    173,428x = 22,482,720,321.60
  5. Step 5: Solve for x
    x = 22,482,720,321.60/173,428
  6. Step 6: Final answer
    x = 129,637.20

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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.