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Finding the Fourth Proportional to 80,831.66, 111,544.65 and 45,020.88

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Solution

The fourth proportional to 80,831.66, 111,544.65 and 45,020.88 is: 62,127.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,831.66 : 111,544.65 = 45,020.88 : x
  2. Step 2: Convert to fraction form
    80,831.66/111,544.65 = 45,020.88/x
  3. Step 3: Cross multiply
    80,831.66x = 111,544.65 × 45,020.88
  4. Step 4: Simplify right side
    80,831.66x = 5,021,838,302.29
  5. Step 5: Solve for x
    x = 5,021,838,302.29/80,831.66
  6. Step 6: Final answer
    x = 62,127.12

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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.