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Finding the Fourth Proportional to 118,407.83, 163,400.90 and 64,691.70

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Solution

The fourth proportional to 118,407.83, 163,400.90 and 64,691.70 is: 89,273.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,407.83 : 163,400.90 = 64,691.70 : x
  2. Step 2: Convert to fraction form
    118,407.83/163,400.90 = 64,691.70/x
  3. Step 3: Cross multiply
    118,407.83x = 163,400.90 × 64,691.70
  4. Step 4: Simplify right side
    118,407.83x = 10,570,682,002.53
  5. Step 5: Solve for x
    x = 10,570,682,002.53/118,407.83
  6. Step 6: Final answer
    x = 89,273.50

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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.