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Finding the Fourth Proportional to 118,691.16, 163,793.52 and 64,976.16

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Solution

The fourth proportional to 118,691.16, 163,793.52 and 64,976.16 is: 89,666.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,691.16 : 163,793.52 = 64,976.16 : x
  2. Step 2: Convert to fraction form
    118,691.16/163,793.52 = 64,976.16/x
  3. Step 3: Cross multiply
    118,691.16x = 163,793.52 × 64,976.16
  4. Step 4: Simplify right side
    118,691.16x = 10,642,673,962.48
  5. Step 5: Solve for x
    x = 10,642,673,962.48/118,691.16
  6. Step 6: Final answer
    x = 89,666.95

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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.