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Finding the Fourth Proportional to 61.42, 91.96 and 45.06

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Solution

The fourth proportional to 61.42, 91.96 and 45.06 is: 67.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.42 : 91.96 = 45.06 : x
  2. Step 2: Convert to fraction form
    61.42/91.96 = 45.06/x
  3. Step 3: Cross multiply
    61.42x = 91.96 × 45.06
  4. Step 4: Simplify right side
    61.42x = 4,143.60
  5. Step 5: Solve for x
    x = 4,143.60/61.42
  6. Step 6: Final answer
    x = 67.47

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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.