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Finding the Fourth Proportional to 71,360.48, 98,478.36 and 39,530

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Solution

The fourth proportional to 71,360.48, 98,478.36 and 39,530 is: 54,551.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,360.48 : 98,478.36 = 39,530 : x
  2. Step 2: Convert to fraction form
    71,360.48/98,478.36 = 39,530/x
  3. Step 3: Cross multiply
    71,360.48x = 98,478.36 × 39,530
  4. Step 4: Simplify right side
    71,360.48x = 3,892,849,570.80
  5. Step 5: Solve for x
    x = 3,892,849,570.80/71,360.48
  6. Step 6: Final answer
    x = 54,551.90

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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.