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Finding the Fourth Proportional to 122,049.27, 168,419.52 and 81,756.53

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Solution

The fourth proportional to 122,049.27, 168,419.52 and 81,756.53 is: 112,818.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,049.27 : 168,419.52 = 81,756.53 : x
  2. Step 2: Convert to fraction form
    122,049.27/168,419.52 = 81,756.53/x
  3. Step 3: Cross multiply
    122,049.27x = 168,419.52 × 81,756.53
  4. Step 4: Simplify right side
    122,049.27x = 13,769,395,539.47
  5. Step 5: Solve for x
    x = 13,769,395,539.47/122,049.27
  6. Step 6: Final answer
    x = 112,818.34

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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.