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Finding the Fourth Proportional to 99,758.76, 137,555.46 and 81,552.66

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Solution

The fourth proportional to 99,758.76, 137,555.46 and 81,552.66 is: 112,451.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,758.76 : 137,555.46 = 81,552.66 : x
  2. Step 2: Convert to fraction form
    99,758.76/137,555.46 = 81,552.66/x
  3. Step 3: Cross multiply
    99,758.76x = 137,555.46 × 81,552.66
  4. Step 4: Simplify right side
    99,758.76x = 11,218,013,660.52
  5. Step 5: Solve for x
    x = 11,218,013,660.52/99,758.76
  6. Step 6: Final answer
    x = 112,451.41

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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.