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Finding the Fourth Proportional to 90,644.13, 125,103.87 and 75,512.82

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Solution

The fourth proportional to 90,644.13, 125,103.87 and 75,512.82 is: 104,220.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,644.13 : 125,103.87 = 75,512.82 : x
  2. Step 2: Convert to fraction form
    90,644.13/125,103.87 = 75,512.82/x
  3. Step 3: Cross multiply
    90,644.13x = 125,103.87 × 75,512.82
  4. Step 4: Simplify right side
    90,644.13x = 9,446,946,016.61
  5. Step 5: Solve for x
    x = 9,446,946,016.61/90,644.13
  6. Step 6: Final answer
    x = 104,220.16

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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.