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Finding the Fourth Proportional to 129,652.68, 178,931.22 and 73,067.88

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Solution

The fourth proportional to 129,652.68, 178,931.22 and 73,067.88 is: 100,839.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,652.68 : 178,931.22 = 73,067.88 : x
  2. Step 2: Convert to fraction form
    129,652.68/178,931.22 = 73,067.88/x
  3. Step 3: Cross multiply
    129,652.68x = 178,931.22 × 73,067.88
  4. Step 4: Simplify right side
    129,652.68x = 13,074,124,911.21
  5. Step 5: Solve for x
    x = 13,074,124,911.21/129,652.68
  6. Step 6: Final answer
    x = 100,839.60

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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.