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Finding the Fourth Proportional to 144,693.78, 199,677.60 and 81,031.56

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Solution

The fourth proportional to 144,693.78, 199,677.60 and 81,031.56 is: 111,823.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,693.78 : 199,677.60 = 81,031.56 : x
  2. Step 2: Convert to fraction form
    144,693.78/199,677.60 = 81,031.56/x
  3. Step 3: Cross multiply
    144,693.78x = 199,677.60 × 81,031.56
  4. Step 4: Simplify right side
    144,693.78x = 16,180,187,425.06
  5. Step 5: Solve for x
    x = 16,180,187,425.06/144,693.78
  6. Step 6: Final answer
    x = 111,823.66

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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.