Home / 129,549.42-178,790.95-75,831.18

Finding the Fourth Proportional to 129,549.42, 178,790.95 and 75,831.18

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Solution

The fourth proportional to 129,549.42, 178,790.95 and 75,831.18 is: 104,654.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,549.42 : 178,790.95 = 75,831.18 : x
  2. Step 2: Convert to fraction form
    129,549.42/178,790.95 = 75,831.18/x
  3. Step 3: Cross multiply
    129,549.42x = 178,790.95 × 75,831.18
  4. Step 4: Simplify right side
    129,549.42x = 13,557,928,711.82
  5. Step 5: Solve for x
    x = 13,557,928,711.82/129,549.42
  6. Step 6: Final answer
    x = 104,654.49

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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.