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Finding the Fourth Proportional to 126,693.88, 174,842.22 and 81,981.88

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Solution

The fourth proportional to 126,693.88, 174,842.22 and 81,981.88 is: 113,138.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,693.88 : 174,842.22 = 81,981.88 : x
  2. Step 2: Convert to fraction form
    126,693.88/174,842.22 = 81,981.88/x
  3. Step 3: Cross multiply
    126,693.88x = 174,842.22 × 81,981.88
  4. Step 4: Simplify right side
    126,693.88x = 14,333,893,898.97
  5. Step 5: Solve for x
    x = 14,333,893,898.97/126,693.88
  6. Step 6: Final answer
    x = 113,138.01

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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.