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Finding the Fourth Proportional to 126,891.50, 175,031.08 and 81,628.50

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Solution

The fourth proportional to 126,891.50, 175,031.08 and 81,628.50 is: 112,596.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,891.50 : 175,031.08 = 81,628.50 : x
  2. Step 2: Convert to fraction form
    126,891.50/175,031.08 = 81,628.50/x
  3. Step 3: Cross multiply
    126,891.50x = 175,031.08 × 81,628.50
  4. Step 4: Simplify right side
    126,891.50x = 14,287,524,513.78
  5. Step 5: Solve for x
    x = 14,287,524,513.78/126,891.50
  6. Step 6: Final answer
    x = 112,596.39

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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.