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Finding the Fourth Proportional to 78,691.07, 108,593.67 and 42,881.07

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Solution

The fourth proportional to 78,691.07, 108,593.67 and 42,881.07 is: 59,175.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,691.07 : 108,593.67 = 42,881.07 : x
  2. Step 2: Convert to fraction form
    78,691.07/108,593.67 = 42,881.07/x
  3. Step 3: Cross multiply
    78,691.07x = 108,593.67 × 42,881.07
  4. Step 4: Simplify right side
    78,691.07x = 4,656,612,518.40
  5. Step 5: Solve for x
    x = 4,656,612,518.40/78,691.07
  6. Step 6: Final answer
    x = 59,175.87

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1.5x scale

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.