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Finding the Fourth Proportional to 118,355.76, 163,330.12 and 64,640.80

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Solution

The fourth proportional to 118,355.76, 163,330.12 and 64,640.80 is: 89,203.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,355.76 : 163,330.12 = 64,640.80 : x
  2. Step 2: Convert to fraction form
    118,355.76/163,330.12 = 64,640.80/x
  3. Step 3: Cross multiply
    118,355.76x = 163,330.12 × 64,640.80
  4. Step 4: Simplify right side
    118,355.76x = 10,557,789,620.90
  5. Step 5: Solve for x
    x = 10,557,789,620.90/118,355.76
  6. Step 6: Final answer
    x = 89,203.85

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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.