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Finding the Fourth Proportional to 99.52, 149.10 and 68.98

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Solution

The fourth proportional to 99.52, 149.10 and 68.98 is: 103.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.52 : 149.10 = 68.98 : x
  2. Step 2: Convert to fraction form
    99.52/149.10 = 68.98/x
  3. Step 3: Cross multiply
    99.52x = 149.10 × 68.98
  4. Step 4: Simplify right side
    99.52x = 10,284.92
  5. Step 5: Solve for x
    x = 10,284.92/99.52
  6. Step 6: Final answer
    x = 103.35

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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.