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Finding the Fourth Proportional to 71,288, 98,403.36 and 41,480

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Solution

The fourth proportional to 71,288, 98,403.36 and 41,480 is: 57,257.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,288 : 98,403.36 = 41,480 : x
  2. Step 2: Convert to fraction form
    71,288/98,403.36 = 41,480/x
  3. Step 3: Cross multiply
    71,288x = 98,403.36 × 41,480
  4. Step 4: Simplify right side
    71,288x = 4,081,771,372.80
  5. Step 5: Solve for x
    x = 4,081,771,372.80/71,288
  6. Step 6: Final answer
    x = 57,257.48

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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.