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Finding the Fourth Proportional to 77,081.20, 115,621.80 and 24,494.80

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Solution

The fourth proportional to 77,081.20, 115,621.80 and 24,494.80 is: 36,742.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,081.20 : 115,621.80 = 24,494.80 : x
  2. Step 2: Convert to fraction form
    77,081.20/115,621.80 = 24,494.80/x
  3. Step 3: Cross multiply
    77,081.20x = 115,621.80 × 24,494.80
  4. Step 4: Simplify right side
    77,081.20x = 2,832,132,866.64
  5. Step 5: Solve for x
    x = 2,832,132,866.64/77,081.20
  6. Step 6: Final answer
    x = 36,742.20

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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.