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Finding the Fourth Proportional to 71,576.56, 98,765 and 39,745.68

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Solution

The fourth proportional to 71,576.56, 98,765 and 39,745.68 is: 54,843.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,576.56 : 98,765 = 39,745.68 : x
  2. Step 2: Convert to fraction form
    71,576.56/98,765 = 39,745.68/x
  3. Step 3: Cross multiply
    71,576.56x = 98,765 × 39,745.68
  4. Step 4: Simplify right side
    71,576.56x = 3,925,482,085.20
  5. Step 5: Solve for x
    x = 3,925,482,085.20/71,576.56
  6. Step 6: Final answer
    x = 54,843.12

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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.