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Finding the Fourth Proportional to 60,720.20, 90,469.80 and 57,324.88

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Solution

The fourth proportional to 60,720.20, 90,469.80 and 57,324.88 is: 85,410.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,720.20 : 90,469.80 = 57,324.88 : x
  2. Step 2: Convert to fraction form
    60,720.20/90,469.80 = 57,324.88/x
  3. Step 3: Cross multiply
    60,720.20x = 90,469.80 × 57,324.88
  4. Step 4: Simplify right side
    60,720.20x = 5,186,170,428.62
  5. Step 5: Solve for x
    x = 5,186,170,428.62/60,720.20
  6. Step 6: Final answer
    x = 85,410.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.