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Finding the Fourth Proportional to 118,691.69, 163,790.42 and 67,720.91

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Solution

The fourth proportional to 118,691.69, 163,790.42 and 67,720.91 is: 93,452.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,691.69 : 163,790.42 = 67,720.91 : x
  2. Step 2: Convert to fraction form
    118,691.69/163,790.42 = 67,720.91/x
  3. Step 3: Cross multiply
    118,691.69x = 163,790.42 × 67,720.91
  4. Step 4: Simplify right side
    118,691.69x = 11,092,035,134.13
  5. Step 5: Solve for x
    x = 11,092,035,134.13/118,691.69
  6. Step 6: Final answer
    x = 93,452.50

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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.