Home / 129,549.92-178,791.64-75,831.68

Finding the Fourth Proportional to 129,549.92, 178,791.64 and 75,831.68

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Solution

The fourth proportional to 129,549.92, 178,791.64 and 75,831.68 is: 104,655.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,549.92 : 178,791.64 = 75,831.68 : x
  2. Step 2: Convert to fraction form
    129,549.92/178,791.64 = 75,831.68/x
  3. Step 3: Cross multiply
    129,549.92x = 178,791.64 × 75,831.68
  4. Step 4: Simplify right side
    129,549.92x = 13,558,070,431.16
  5. Step 5: Solve for x
    x = 13,558,070,431.16/129,549.92
  6. Step 6: Final answer
    x = 104,655.18

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1.5x scale

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.