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Finding the Fourth Proportional to 129,254.52, 178,387.84 and 72,676.82

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Solution

The fourth proportional to 129,254.52, 178,387.84 and 72,676.82 is: 100,303.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,254.52 : 178,387.84 = 72,676.82 : x
  2. Step 2: Convert to fraction form
    129,254.52/178,387.84 = 72,676.82/x
  3. Step 3: Cross multiply
    129,254.52x = 178,387.84 × 72,676.82
  4. Step 4: Simplify right side
    129,254.52x = 12,964,660,937.87
  5. Step 5: Solve for x
    x = 12,964,660,937.87/129,254.52
  6. Step 6: Final answer
    x = 100,303.35

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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.