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Finding the Fourth Proportional to 126,798.40, 175,034.28 and 81,478.90

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Solution

The fourth proportional to 126,798.40, 175,034.28 and 81,478.90 is: 112,474.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,798.40 : 175,034.28 = 81,478.90 : x
  2. Step 2: Convert to fraction form
    126,798.40/175,034.28 = 81,478.90/x
  3. Step 3: Cross multiply
    126,798.40x = 175,034.28 × 81,478.90
  4. Step 4: Simplify right side
    126,798.40x = 14,261,600,596.69
  5. Step 5: Solve for x
    x = 14,261,600,596.69/126,798.40
  6. Step 6: Final answer
    x = 112,474.61

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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.