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Finding the Fourth Proportional to 83,712.79, 115,523.56 and 45,472.36

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Solution

The fourth proportional to 83,712.79, 115,523.56 and 45,472.36 is: 62,751.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,712.79 : 115,523.56 = 45,472.36 : x
  2. Step 2: Convert to fraction form
    83,712.79/115,523.56 = 45,472.36/x
  3. Step 3: Cross multiply
    83,712.79x = 115,523.56 × 45,472.36
  4. Step 4: Simplify right side
    83,712.79x = 5,253,128,681.44
  5. Step 5: Solve for x
    x = 5,253,128,681.44/83,712.79
  6. Step 6: Final answer
    x = 62,751.81

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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.