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Finding the Fourth Proportional to 157,045.60, 216,721.95 and 85,425.91

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Solution

The fourth proportional to 157,045.60, 216,721.95 and 85,425.91 is: 117,887.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,045.60 : 216,721.95 = 85,425.91 : x
  2. Step 2: Convert to fraction form
    157,045.60/216,721.95 = 85,425.91/x
  3. Step 3: Cross multiply
    157,045.60x = 216,721.95 × 85,425.91
  4. Step 4: Simplify right side
    157,045.60x = 18,513,669,654.35
  5. Step 5: Solve for x
    x = 18,513,669,654.35/157,045.60
  6. Step 6: Final answer
    x = 117,887.22

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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.