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Finding the Fourth Proportional to 113.01, 155.87 and 71.52

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Solution

The fourth proportional to 113.01, 155.87 and 71.52 is: 98.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.01 : 155.87 = 71.52 : x
  2. Step 2: Convert to fraction form
    113.01/155.87 = 71.52/x
  3. Step 3: Cross multiply
    113.01x = 155.87 × 71.52
  4. Step 4: Simplify right side
    113.01x = 11,147.82
  5. Step 5: Solve for x
    x = 11,147.82/113.01
  6. Step 6: Final answer
    x = 98.64

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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.