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Finding the Fourth Proportional to 129,904.40, 179,264.40 and 72,543.44

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Solution

The fourth proportional to 129,904.40, 179,264.40 and 72,543.44 is: 100,107.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,904.40 : 179,264.40 = 72,543.44 : x
  2. Step 2: Convert to fraction form
    129,904.40/179,264.40 = 72,543.44/x
  3. Step 3: Cross multiply
    129,904.40x = 179,264.40 × 72,543.44
  4. Step 4: Simplify right side
    129,904.40x = 13,004,456,245.54
  5. Step 5: Solve for x
    x = 13,004,456,245.54/129,904.40
  6. Step 6: Final answer
    x = 100,107.90

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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.