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Finding the Fourth Proportional to 91,729.90, 137,594.85 and 84,512.80

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Solution

The fourth proportional to 91,729.90, 137,594.85 and 84,512.80 is: 126,769.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,729.90 : 137,594.85 = 84,512.80 : x
  2. Step 2: Convert to fraction form
    91,729.90/137,594.85 = 84,512.80/x
  3. Step 3: Cross multiply
    91,729.90x = 137,594.85 × 84,512.80
  4. Step 4: Simplify right side
    91,729.90x = 11,628,526,039.08
  5. Step 5: Solve for x
    x = 11,628,526,039.08/91,729.90
  6. Step 6: Final answer
    x = 126,769.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.