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Finding the Fourth Proportional to 75,621.20, 113,431.80 and 40,542.80

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Solution

The fourth proportional to 75,621.20, 113,431.80 and 40,542.80 is: 60,814.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,621.20 : 113,431.80 = 40,542.80 : x
  2. Step 2: Convert to fraction form
    75,621.20/113,431.80 = 40,542.80/x
  3. Step 3: Cross multiply
    75,621.20x = 113,431.80 × 40,542.80
  4. Step 4: Simplify right side
    75,621.20x = 4,598,842,781.04
  5. Step 5: Solve for x
    x = 4,598,842,781.04/75,621.20
  6. Step 6: Final answer
    x = 60,814.20

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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.