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Finding the Fourth Proportional to 61.86, 85.26 and 43.47

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Solution

The fourth proportional to 61.86, 85.26 and 43.47 is: 59.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.86 : 85.26 = 43.47 : x
  2. Step 2: Convert to fraction form
    61.86/85.26 = 43.47/x
  3. Step 3: Cross multiply
    61.86x = 85.26 × 43.47
  4. Step 4: Simplify right side
    61.86x = 3,706.25
  5. Step 5: Solve for x
    x = 3,706.25/61.86
  6. Step 6: Final answer
    x = 59.91

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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.