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Finding the Fourth Proportional to 81,693.76, 112,737.84 and 45,883.78

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Solution

The fourth proportional to 81,693.76, 112,737.84 and 45,883.78 is: 63,319.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,693.76 : 112,737.84 = 45,883.78 : x
  2. Step 2: Convert to fraction form
    81,693.76/112,737.84 = 45,883.78/x
  3. Step 3: Cross multiply
    81,693.76x = 112,737.84 × 45,883.78
  4. Step 4: Simplify right side
    81,693.76x = 5,172,838,248.24
  5. Step 5: Solve for x
    x = 5,172,838,248.24/81,693.76
  6. Step 6: Final answer
    x = 63,319.87

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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.