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Finding the Fourth Proportional to 71,598.40, 98,805.90 and 39,766.48

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Solution

The fourth proportional to 71,598.40, 98,805.90 and 39,766.48 is: 54,877.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,598.40 : 98,805.90 = 39,766.48 : x
  2. Step 2: Convert to fraction form
    71,598.40/98,805.90 = 39,766.48/x
  3. Step 3: Cross multiply
    71,598.40x = 98,805.90 × 39,766.48
  4. Step 4: Simplify right side
    71,598.40x = 3,929,162,846.23
  5. Step 5: Solve for x
    x = 3,929,162,846.23/71,598.40
  6. Step 6: Final answer
    x = 54,877.80

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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.