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Finding the Fourth Proportional to 67,220.76, 100,720.20 and 39,061.77

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Solution

The fourth proportional to 67,220.76, 100,720.20 and 39,061.77 is: 58,528.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,220.76 : 100,720.20 = 39,061.77 : x
  2. Step 2: Convert to fraction form
    67,220.76/100,720.20 = 39,061.77/x
  3. Step 3: Cross multiply
    67,220.76x = 100,720.20 × 39,061.77
  4. Step 4: Simplify right side
    67,220.76x = 3,934,309,286.75
  5. Step 5: Solve for x
    x = 3,934,309,286.75/67,220.76
  6. Step 6: Final answer
    x = 58,528.19

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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.