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Finding the Fourth Proportional to 61.70, 91.98 and 60.98

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Solution

The fourth proportional to 61.70, 91.98 and 60.98 is: 90.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.70 : 91.98 = 60.98 : x
  2. Step 2: Convert to fraction form
    61.70/91.98 = 60.98/x
  3. Step 3: Cross multiply
    61.70x = 91.98 × 60.98
  4. Step 4: Simplify right side
    61.70x = 5,608.94
  5. Step 5: Solve for x
    x = 5,608.94/61.70
  6. Step 6: Final answer
    x = 90.91

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.