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Finding the Fourth Proportional to 98.59, 147.87 and 40.82

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Solution

The fourth proportional to 98.59, 147.87 and 40.82 is: 61.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.59 : 147.87 = 40.82 : x
  2. Step 2: Convert to fraction form
    98.59/147.87 = 40.82/x
  3. Step 3: Cross multiply
    98.59x = 147.87 × 40.82
  4. Step 4: Simplify right side
    98.59x = 6,036.05
  5. Step 5: Solve for x
    x = 6,036.05/98.59
  6. Step 6: Final answer
    x = 61.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.