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Finding the Fourth Proportional to 126,890.50, 175,029.70 and 81,627.50

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Solution

The fourth proportional to 126,890.50, 175,029.70 and 81,627.50 is: 112,595.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,890.50 : 175,029.70 = 81,627.50 : x
  2. Step 2: Convert to fraction form
    126,890.50/175,029.70 = 81,627.50/x
  3. Step 3: Cross multiply
    126,890.50x = 175,029.70 × 81,627.50
  4. Step 4: Simplify right side
    126,890.50x = 14,287,236,836.75
  5. Step 5: Solve for x
    x = 14,287,236,836.75/126,890.50
  6. Step 6: Final answer
    x = 112,595.01

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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.