Home / 73,129.24-109,685.28-20,543.20

Finding the Fourth Proportional to 73,129.24, 109,685.28 and 20,543.20

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Solution

The fourth proportional to 73,129.24, 109,685.28 and 20,543.20 is: 30,812.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,129.24 : 109,685.28 = 20,543.20 : x
  2. Step 2: Convert to fraction form
    73,129.24/109,685.28 = 20,543.20/x
  3. Step 3: Cross multiply
    73,129.24x = 109,685.28 × 20,543.20
  4. Step 4: Simplify right side
    73,129.24x = 2,253,286,644.10
  5. Step 5: Solve for x
    x = 2,253,286,644.10/73,129.24
  6. Step 6: Final answer
    x = 30,812.39

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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.