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Finding the Fourth Proportional to 100,650.60, 138,891.24 and 55,319.76

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Solution

The fourth proportional to 100,650.60, 138,891.24 and 55,319.76 is: 76,337.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,650.60 : 138,891.24 = 55,319.76 : x
  2. Step 2: Convert to fraction form
    100,650.60/138,891.24 = 55,319.76/x
  3. Step 3: Cross multiply
    100,650.60x = 138,891.24 × 55,319.76
  4. Step 4: Simplify right side
    100,650.60x = 7,683,430,062.90
  5. Step 5: Solve for x
    x = 7,683,430,062.90/100,650.60
  6. Step 6: Final answer
    x = 76,337.65

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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.