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Finding the Fourth Proportional to 65.36, 97.36 and 61.42

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Solution

The fourth proportional to 65.36, 97.36 and 61.42 is: 91.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.36 : 97.36 = 61.42 : x
  2. Step 2: Convert to fraction form
    65.36/97.36 = 61.42/x
  3. Step 3: Cross multiply
    65.36x = 97.36 × 61.42
  4. Step 4: Simplify right side
    65.36x = 5,980.21
  5. Step 5: Solve for x
    x = 5,980.21/65.36
  6. Step 6: Final answer
    x = 91.50

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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.