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Finding the Fourth Proportional to 100,391.91, 150,512.98 and 60,401.53

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Solution

The fourth proportional to 100,391.91, 150,512.98 and 60,401.53 is: 90,557.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,391.91 : 150,512.98 = 60,401.53 : x
  2. Step 2: Convert to fraction form
    100,391.91/150,512.98 = 60,401.53/x
  3. Step 3: Cross multiply
    100,391.91x = 150,512.98 × 60,401.53
  4. Step 4: Simplify right side
    100,391.91x = 9,091,214,276.86
  5. Step 5: Solve for x
    x = 9,091,214,276.86/100,391.91
  6. Step 6: Final answer
    x = 90,557.24

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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.