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Finding the Fourth Proportional to 71,578.89, 98,777.34 and 39,747.24

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Solution

The fourth proportional to 71,578.89, 98,777.34 and 39,747.24 is: 54,850.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,578.89 : 98,777.34 = 39,747.24 : x
  2. Step 2: Convert to fraction form
    71,578.89/98,777.34 = 39,747.24/x
  3. Step 3: Cross multiply
    71,578.89x = 98,777.34 × 39,747.24
  4. Step 4: Simplify right side
    71,578.89x = 3,926,126,639.54
  5. Step 5: Solve for x
    x = 3,926,126,639.54/71,578.89
  6. Step 6: Final answer
    x = 54,850.34

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1.5x scale

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.