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Finding the Fourth Proportional to 100,887.92, 139,231.65 and 55,565.89

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Solution

The fourth proportional to 100,887.92, 139,231.65 and 55,565.89 is: 76,684.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,887.92 : 139,231.65 = 55,565.89 : x
  2. Step 2: Convert to fraction form
    100,887.92/139,231.65 = 55,565.89/x
  3. Step 3: Cross multiply
    100,887.92x = 139,231.65 × 55,565.89
  4. Step 4: Simplify right side
    100,887.92x = 7,736,530,548.42
  5. Step 5: Solve for x
    x = 7,736,530,548.42/100,887.92
  6. Step 6: Final answer
    x = 76,684.41

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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.