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Finding the Fourth Proportional to 87,319.01, 120,499.90 and 49,079.62

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Solution

The fourth proportional to 87,319.01, 120,499.90 and 49,079.62 is: 67,729.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,319.01 : 120,499.90 = 49,079.62 : x
  2. Step 2: Convert to fraction form
    87,319.01/120,499.90 = 49,079.62/x
  3. Step 3: Cross multiply
    87,319.01x = 120,499.90 × 49,079.62
  4. Step 4: Simplify right side
    87,319.01x = 5,914,089,606.04
  5. Step 5: Solve for x
    x = 5,914,089,606.04/87,319.01
  6. Step 6: Final answer
    x = 67,729.69

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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.