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Finding the Fourth Proportional to 165,691.65, 228,654.45 and 90,240.15

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Solution

The fourth proportional to 165,691.65, 228,654.45 and 90,240.15 is: 124,531.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,691.65 : 228,654.45 = 90,240.15 : x
  2. Step 2: Convert to fraction form
    165,691.65/228,654.45 = 90,240.15/x
  3. Step 3: Cross multiply
    165,691.65x = 228,654.45 × 90,240.15
  4. Step 4: Simplify right side
    165,691.65x = 20,633,811,866.17
  5. Step 5: Solve for x
    x = 20,633,811,866.17/165,691.65
  6. Step 6: Final answer
    x = 124,531.39

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1.5x scale

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.