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Finding the Fourth Proportional to 73,288.74, 109,931.28 and 20,697.48

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Solution

The fourth proportional to 73,288.74, 109,931.28 and 20,697.48 is: 31,045.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,288.74 : 109,931.28 = 20,697.48 : x
  2. Step 2: Convert to fraction form
    73,288.74/109,931.28 = 20,697.48/x
  3. Step 3: Cross multiply
    73,288.74x = 109,931.28 × 20,697.48
  4. Step 4: Simplify right side
    73,288.74x = 2,275,300,469.17
  5. Step 5: Solve for x
    x = 2,275,300,469.17/73,288.74
  6. Step 6: Final answer
    x = 31,045.70

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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.