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Finding the Fourth Proportional to 163,308.80, 225,360.32 and 91,691.84

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Solution

The fourth proportional to 163,308.80, 225,360.32 and 91,691.84 is: 126,531.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,308.80 : 225,360.32 = 91,691.84 : x
  2. Step 2: Convert to fraction form
    163,308.80/225,360.32 = 91,691.84/x
  3. Step 3: Cross multiply
    163,308.80x = 225,360.32 × 91,691.84
  4. Step 4: Simplify right side
    163,308.80x = 20,663,700,818.53
  5. Step 5: Solve for x
    x = 20,663,700,818.53/163,308.80
  6. Step 6: Final answer
    x = 126,531.46

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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.