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Finding the Fourth Proportional to 65.40, 97.98 and 61.53

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Solution

The fourth proportional to 65.40, 97.98 and 61.53 is: 92.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.40 : 97.98 = 61.53 : x
  2. Step 2: Convert to fraction form
    65.40/97.98 = 61.53/x
  3. Step 3: Cross multiply
    65.40x = 97.98 × 61.53
  4. Step 4: Simplify right side
    65.40x = 6,028.71
  5. Step 5: Solve for x
    x = 6,028.71/65.40
  6. Step 6: Final answer
    x = 92.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.