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Finding the Fourth Proportional to 109,628.60, 151,316.71 and 61,909.88

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Solution

The fourth proportional to 109,628.60, 151,316.71 and 61,909.88 is: 85,452.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,628.60 : 151,316.71 = 61,909.88 : x
  2. Step 2: Convert to fraction form
    109,628.60/151,316.71 = 61,909.88/x
  3. Step 3: Cross multiply
    109,628.60x = 151,316.71 × 61,909.88
  4. Step 4: Simplify right side
    109,628.60x = 9,367,998,446.74
  5. Step 5: Solve for x
    x = 9,367,998,446.74/109,628.60
  6. Step 6: Final answer
    x = 85,452.14

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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.