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Finding the Fourth Proportional to 136,886.52, 188,897.76 and 76,456.88

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Solution

The fourth proportional to 136,886.52, 188,897.76 and 76,456.88 is: 105,507.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,886.52 : 188,897.76 = 76,456.88 : x
  2. Step 2: Convert to fraction form
    136,886.52/188,897.76 = 76,456.88/x
  3. Step 3: Cross multiply
    136,886.52x = 188,897.76 × 76,456.88
  4. Step 4: Simplify right side
    136,886.52x = 14,442,532,424.10
  5. Step 5: Solve for x
    x = 14,442,532,424.10/136,886.52
  6. Step 6: Final answer
    x = 105,507.34

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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.