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Finding the Fourth Proportional to 71,576.60, 98,776.80 and 39,745.80

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Solution

The fourth proportional to 71,576.60, 98,776.80 and 39,745.80 is: 54,849.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,576.60 : 98,776.80 = 39,745.80 : x
  2. Step 2: Convert to fraction form
    71,576.60/98,776.80 = 39,745.80/x
  3. Step 3: Cross multiply
    71,576.60x = 98,776.80 × 39,745.80
  4. Step 4: Simplify right side
    71,576.60x = 3,925,962,937.44
  5. Step 5: Solve for x
    x = 3,925,962,937.44/71,576.60
  6. Step 6: Final answer
    x = 54,849.81

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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.