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Finding the Fourth Proportional to 61.76, 85.21 and 37.19

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Solution

The fourth proportional to 61.76, 85.21 and 37.19 is: 51.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.76 : 85.21 = 37.19 : x
  2. Step 2: Convert to fraction form
    61.76/85.21 = 37.19/x
  3. Step 3: Cross multiply
    61.76x = 85.21 × 37.19
  4. Step 4: Simplify right side
    61.76x = 3,168.96
  5. Step 5: Solve for x
    x = 3,168.96/61.76
  6. Step 6: Final answer
    x = 51.31

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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.