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Finding the Fourth Proportional to 61.90, 84.93 and 60.82

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Solution

The fourth proportional to 61.90, 84.93 and 60.82 is: 83.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.90 : 84.93 = 60.82 : x
  2. Step 2: Convert to fraction form
    61.90/84.93 = 60.82/x
  3. Step 3: Cross multiply
    61.90x = 84.93 × 60.82
  4. Step 4: Simplify right side
    61.90x = 5,165.34
  5. Step 5: Solve for x
    x = 5,165.34/61.90
  6. Step 6: Final answer
    x = 83.45

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.