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Finding the Fourth Proportional to 99,697.80, 137,505.17 and 63,891.14

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Solution

The fourth proportional to 99,697.80, 137,505.17 and 63,891.14 is: 88,119.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,697.80 : 137,505.17 = 63,891.14 : x
  2. Step 2: Convert to fraction form
    99,697.80/137,505.17 = 63,891.14/x
  3. Step 3: Cross multiply
    99,697.80x = 137,505.17 × 63,891.14
  4. Step 4: Simplify right side
    99,697.80x = 8,785,362,067.19
  5. Step 5: Solve for x
    x = 8,785,362,067.19/99,697.80
  6. Step 6: Final answer
    x = 88,119.92

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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.