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Finding the Fourth Proportional to 67,720.80, 101,503.20 and 36,490.56

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Solution

The fourth proportional to 67,720.80, 101,503.20 and 36,490.56 is: 54,693.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,720.80 : 101,503.20 = 36,490.56 : x
  2. Step 2: Convert to fraction form
    67,720.80/101,503.20 = 36,490.56/x
  3. Step 3: Cross multiply
    67,720.80x = 101,503.20 × 36,490.56
  4. Step 4: Simplify right side
    67,720.80x = 3,703,908,609.79
  5. Step 5: Solve for x
    x = 3,703,908,609.79/67,720.80
  6. Step 6: Final answer
    x = 54,693.81

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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.