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Finding the Fourth Proportional to 60,520.40, 90,683.40 and 57,021.20

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Solution

The fourth proportional to 60,520.40, 90,683.40 and 57,021.20 is: 85,440.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,520.40 : 90,683.40 = 57,021.20 : x
  2. Step 2: Convert to fraction form
    60,520.40/90,683.40 = 57,021.20/x
  3. Step 3: Cross multiply
    60,520.40x = 90,683.40 × 57,021.20
  4. Step 4: Simplify right side
    60,520.40x = 5,170,876,288.08
  5. Step 5: Solve for x
    x = 5,170,876,288.08/60,520.40
  6. Step 6: Final answer
    x = 85,440.22

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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.