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Finding the Fourth Proportional to 42.16, 63.12 and 26.12

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Solution

The fourth proportional to 42.16, 63.12 and 26.12 is: 39.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    42.16 : 63.12 = 26.12 : x
  2. Step 2: Convert to fraction form
    42.16/63.12 = 26.12/x
  3. Step 3: Cross multiply
    42.16x = 63.12 × 26.12
  4. Step 4: Simplify right side
    42.16x = 1,648.69
  5. Step 5: Solve for x
    x = 1,648.69/42.16
  6. Step 6: Final answer
    x = 39.11

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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.