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Finding the Fourth Proportional to 161,715.70, 242,573.55 and 138,387.70

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Solution

The fourth proportional to 161,715.70, 242,573.55 and 138,387.70 is: 207,581.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,715.70 : 242,573.55 = 138,387.70 : x
  2. Step 2: Convert to fraction form
    161,715.70/242,573.55 = 138,387.70/x
  3. Step 3: Cross multiply
    161,715.70x = 242,573.55 × 138,387.70
  4. Step 4: Simplify right side
    161,715.70x = 33,569,195,665.34
  5. Step 5: Solve for x
    x = 33,569,195,665.34/161,715.70
  6. Step 6: Final answer
    x = 207,581.55

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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.