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Finding the Fourth Proportional to 71,672.40, 98,579.04 and 57,494.16

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Solution

The fourth proportional to 71,672.40, 98,579.04 and 57,494.16 is: 79,078.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,672.40 : 98,579.04 = 57,494.16 : x
  2. Step 2: Convert to fraction form
    71,672.40/98,579.04 = 57,494.16/x
  3. Step 3: Cross multiply
    71,672.40x = 98,579.04 × 57,494.16
  4. Step 4: Simplify right side
    71,672.40x = 5,667,719,098.41
  5. Step 5: Solve for x
    x = 5,667,719,098.41/71,672.40
  6. Step 6: Final answer
    x = 79,078.13

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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.