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Finding the Fourth Proportional to 165,687.61, 228,648.90 and 90,236.11

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Solution

The fourth proportional to 165,687.61, 228,648.90 and 90,236.11 is: 124,525.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,687.61 : 228,648.90 = 90,236.11 : x
  2. Step 2: Convert to fraction form
    165,687.61/228,648.90 = 90,236.11/x
  3. Step 3: Cross multiply
    165,687.61x = 228,648.90 × 90,236.11
  4. Step 4: Simplify right side
    165,687.61x = 20,632,387,233.47
  5. Step 5: Solve for x
    x = 20,632,387,233.47/165,687.61
  6. Step 6: Final answer
    x = 124,525.83

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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.