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Finding the Fourth Proportional to 126,801.40, 175,038.42 and 81,481.90

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Solution

The fourth proportional to 126,801.40, 175,038.42 and 81,481.90 is: 112,478.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,801.40 : 175,038.42 = 81,481.90 : x
  2. Step 2: Convert to fraction form
    126,801.40/175,038.42 = 81,481.90/x
  3. Step 3: Cross multiply
    126,801.40x = 175,038.42 × 81,481.90
  4. Step 4: Simplify right side
    126,801.40x = 14,262,463,034.60
  5. Step 5: Solve for x
    x = 14,262,463,034.60/126,801.40
  6. Step 6: Final answer
    x = 112,478.75

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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.