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Finding the Fourth Proportional to 71,579.64, 98,872.86 and 54,480

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Solution

The fourth proportional to 71,579.64, 98,872.86 and 54,480 is: 75,253.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,579.64 : 98,872.86 = 54,480 : x
  2. Step 2: Convert to fraction form
    71,579.64/98,872.86 = 54,480/x
  3. Step 3: Cross multiply
    71,579.64x = 98,872.86 × 54,480
  4. Step 4: Simplify right side
    71,579.64x = 5,386,593,412.80
  5. Step 5: Solve for x
    x = 5,386,593,412.80/71,579.64
  6. Step 6: Final answer
    x = 75,253.15

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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.