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Finding the Fourth Proportional to 99,921.66, 137,633.19 and 69,652.86

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Solution

The fourth proportional to 99,921.66, 137,633.19 and 69,652.86 is: 95,940.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,921.66 : 137,633.19 = 69,652.86 : x
  2. Step 2: Convert to fraction form
    99,921.66/137,633.19 = 69,652.86/x
  3. Step 3: Cross multiply
    99,921.66x = 137,633.19 × 69,652.86
  4. Step 4: Simplify right side
    99,921.66x = 9,586,545,314.42
  5. Step 5: Solve for x
    x = 9,586,545,314.42/99,921.66
  6. Step 6: Final answer
    x = 95,940.61

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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.