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Finding the Fourth Proportional to 91,987.20, 137,980.80 and 47,627.55

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Solution

The fourth proportional to 91,987.20, 137,980.80 and 47,627.55 is: 71,441.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,987.20 : 137,980.80 = 47,627.55 : x
  2. Step 2: Convert to fraction form
    91,987.20/137,980.80 = 47,627.55/x
  3. Step 3: Cross multiply
    91,987.20x = 137,980.80 × 47,627.55
  4. Step 4: Simplify right side
    91,987.20x = 6,571,687,451.04
  5. Step 5: Solve for x
    x = 6,571,687,451.04/91,987.20
  6. Step 6: Final answer
    x = 71,441.33

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Similar ratio
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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.