Home / 127,288.11-175,512.66-81,285.78

Finding the Fourth Proportional to 127,288.11, 175,512.66 and 81,285.78

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Solution

The fourth proportional to 127,288.11, 175,512.66 and 81,285.78 is: 112,081.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,288.11 : 175,512.66 = 81,285.78 : x
  2. Step 2: Convert to fraction form
    127,288.11/175,512.66 = 81,285.78/x
  3. Step 3: Cross multiply
    127,288.11x = 175,512.66 × 81,285.78
  4. Step 4: Simplify right side
    127,288.11x = 14,266,683,467.97
  5. Step 5: Solve for x
    x = 14,266,683,467.97/127,288.11
  6. Step 6: Final answer
    x = 112,081.82

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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.