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Finding the Fourth Proportional to 80,443.80, 120,505.32 and 62,831.16

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Solution

The fourth proportional to 80,443.80, 120,505.32 and 62,831.16 is: 94,121.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,443.80 : 120,505.32 = 62,831.16 : x
  2. Step 2: Convert to fraction form
    80,443.80/120,505.32 = 62,831.16/x
  3. Step 3: Cross multiply
    80,443.80x = 120,505.32 × 62,831.16
  4. Step 4: Simplify right side
    80,443.80x = 7,571,489,041.77
  5. Step 5: Solve for x
    x = 7,571,489,041.77/80,443.80
  6. Step 6: Final answer
    x = 94,121.47

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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.