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Finding the Fourth Proportional to 61.95, 92.96 and 43.79

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Solution

The fourth proportional to 61.95, 92.96 and 43.79 is: 65.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.95 : 92.96 = 43.79 : x
  2. Step 2: Convert to fraction form
    61.95/92.96 = 43.79/x
  3. Step 3: Cross multiply
    61.95x = 92.96 × 43.79
  4. Step 4: Simplify right side
    61.95x = 4,070.47
  5. Step 5: Solve for x
    x = 4,070.47/61.95
  6. Step 6: Final answer
    x = 65.70

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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.