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Finding the Fourth Proportional to 157,001.72, 235,423.84 and 72,689.52

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Solution

The fourth proportional to 157,001.72, 235,423.84 and 72,689.52 is: 108,997.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,001.72 : 235,423.84 = 72,689.52 : x
  2. Step 2: Convert to fraction form
    157,001.72/235,423.84 = 72,689.52/x
  3. Step 3: Cross multiply
    157,001.72x = 235,423.84 × 72,689.52
  4. Step 4: Simplify right side
    157,001.72x = 17,112,845,926.16
  5. Step 5: Solve for x
    x = 17,112,845,926.16/157,001.72
  6. Step 6: Final answer
    x = 108,997.82

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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.