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Finding the Fourth Proportional to 136,613.40, 188,527.56 and 76,187.88

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Solution

The fourth proportional to 136,613.40, 188,527.56 and 76,187.88 is: 105,139.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,613.40 : 188,527.56 = 76,187.88 : x
  2. Step 2: Convert to fraction form
    136,613.40/188,527.56 = 76,187.88/x
  3. Step 3: Cross multiply
    136,613.40x = 188,527.56 × 76,187.88
  4. Step 4: Simplify right side
    136,613.40x = 14,363,515,117.97
  5. Step 5: Solve for x
    x = 14,363,515,117.97/136,613.40
  6. Step 6: Final answer
    x = 105,139.87

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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.