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Finding the Fourth Proportional to 67,348.56, 100,878.12 and 54,641.28

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Solution

The fourth proportional to 67,348.56, 100,878.12 and 54,641.28 is: 81,844.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,348.56 : 100,878.12 = 54,641.28 : x
  2. Step 2: Convert to fraction form
    67,348.56/100,878.12 = 54,641.28/x
  3. Step 3: Cross multiply
    67,348.56x = 100,878.12 × 54,641.28
  4. Step 4: Simplify right side
    67,348.56x = 5,512,109,600.79
  5. Step 5: Solve for x
    x = 5,512,109,600.79/67,348.56
  6. Step 6: Final answer
    x = 81,844.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.