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Finding the Fourth Proportional to 45,235.60, 67,831.84 and 20,275.88

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Solution

The fourth proportional to 45,235.60, 67,831.84 and 20,275.88 is: 30,404.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,235.60 : 67,831.84 = 20,275.88 : x
  2. Step 2: Convert to fraction form
    45,235.60/67,831.84 = 20,275.88/x
  3. Step 3: Cross multiply
    45,235.60x = 67,831.84 × 20,275.88
  4. Step 4: Simplify right side
    45,235.60x = 1,375,350,248.02
  5. Step 5: Solve for x
    x = 1,375,350,248.02/45,235.60
  6. Step 6: Final answer
    x = 30,404.16

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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.