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Finding the Fourth Proportional to 60,685, 91,042.86 and 16,909

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Solution

The fourth proportional to 60,685, 91,042.86 and 16,909 is: 25,367.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,685 : 91,042.86 = 16,909 : x
  2. Step 2: Convert to fraction form
    60,685/91,042.86 = 16,909/x
  3. Step 3: Cross multiply
    60,685x = 91,042.86 × 16,909
  4. Step 4: Simplify right side
    60,685x = 1,539,443,719.74
  5. Step 5: Solve for x
    x = 1,539,443,719.74/60,685
  6. Step 6: Final answer
    x = 25,367.78

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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.