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Finding the Fourth Proportional to 99.48, 149.30 and 65.23

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Solution

The fourth proportional to 99.48, 149.30 and 65.23 is: 97.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.48 : 149.30 = 65.23 : x
  2. Step 2: Convert to fraction form
    99.48/149.30 = 65.23/x
  3. Step 3: Cross multiply
    99.48x = 149.30 × 65.23
  4. Step 4: Simplify right side
    99.48x = 9,738.84
  5. Step 5: Solve for x
    x = 9,738.84/99.48
  6. Step 6: Final answer
    x = 97.90

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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.