Home / 129,549.27-178,777.22-72,978.87

Finding the Fourth Proportional to 129,549.27, 178,777.22 and 72,978.87

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Solution

The fourth proportional to 129,549.27, 178,777.22 and 72,978.87 is: 100,710.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,549.27 : 178,777.22 = 72,978.87 : x
  2. Step 2: Convert to fraction form
    129,549.27/178,777.22 = 72,978.87/x
  3. Step 3: Cross multiply
    129,549.27x = 178,777.22 × 72,978.87
  4. Step 4: Simplify right side
    129,549.27x = 13,046,959,132.45
  5. Step 5: Solve for x
    x = 13,046,959,132.45/129,549.27
  6. Step 6: Final answer
    x = 100,710.40

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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.