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Finding the Fourth Proportional to 61.86, 85.37 and 37.30

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Solution

The fourth proportional to 61.86, 85.37 and 37.30 is: 51.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.86 : 85.37 = 37.30 : x
  2. Step 2: Convert to fraction form
    61.86/85.37 = 37.30/x
  3. Step 3: Cross multiply
    61.86x = 85.37 × 37.30
  4. Step 4: Simplify right side
    61.86x = 3,184.30
  5. Step 5: Solve for x
    x = 3,184.30/61.86
  6. Step 6: Final answer
    x = 51.48

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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.