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Finding the Fourth Proportional to 165,018, 247,531.86 and 40,359

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Solution

The fourth proportional to 165,018, 247,531.86 and 40,359 is: 60,539.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,018 : 247,531.86 = 40,359 : x
  2. Step 2: Convert to fraction form
    165,018/247,531.86 = 40,359/x
  3. Step 3: Cross multiply
    165,018x = 247,531.86 × 40,359
  4. Step 4: Simplify right side
    165,018x = 9,990,138,337.74
  5. Step 5: Solve for x
    x = 9,990,138,337.74/165,018
  6. Step 6: Final answer
    x = 60,539.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.