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Finding the Fourth Proportional to 100,866.08, 139,195.20 and 55,543.95

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Solution

The fourth proportional to 100,866.08, 139,195.20 and 55,543.95 is: 76,650.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,866.08 : 139,195.20 = 55,543.95 : x
  2. Step 2: Convert to fraction form
    100,866.08/139,195.20 = 55,543.95/x
  3. Step 3: Cross multiply
    100,866.08x = 139,195.20 × 55,543.95
  4. Step 4: Simplify right side
    100,866.08x = 7,731,451,229.04
  5. Step 5: Solve for x
    x = 7,731,451,229.04/100,866.08
  6. Step 6: Final answer
    x = 76,650.66

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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.