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Finding the Fourth Proportional to 111,209.92, 153,480.67 and 63,470.40

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Solution

The fourth proportional to 111,209.92, 153,480.67 and 63,470.40 is: 87,595.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,209.92 : 153,480.67 = 63,470.40 : x
  2. Step 2: Convert to fraction form
    111,209.92/153,480.67 = 63,470.40/x
  3. Step 3: Cross multiply
    111,209.92x = 153,480.67 × 63,470.40
  4. Step 4: Simplify right side
    111,209.92x = 9,741,479,517.17
  5. Step 5: Solve for x
    x = 9,741,479,517.17/111,209.92
  6. Step 6: Final answer
    x = 87,595.42

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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.