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Finding the Fourth Proportional to 80,642.64, 111,290.80 and 44,831.88

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Solution

The fourth proportional to 80,642.64, 111,290.80 and 44,831.88 is: 61,870.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,642.64 : 111,290.80 = 44,831.88 : x
  2. Step 2: Convert to fraction form
    80,642.64/111,290.80 = 44,831.88/x
  3. Step 3: Cross multiply
    80,642.64x = 111,290.80 × 44,831.88
  4. Step 4: Simplify right side
    80,642.64x = 4,989,375,790.70
  5. Step 5: Solve for x
    x = 4,989,375,790.70/80,642.64
  6. Step 6: Final answer
    x = 61,870.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.