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Finding the Fourth Proportional to 99.34, 149.28 and 92.86

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Solution

The fourth proportional to 99.34, 149.28 and 92.86 is: 139.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.34 : 149.28 = 92.86 : x
  2. Step 2: Convert to fraction form
    99.34/149.28 = 92.86/x
  3. Step 3: Cross multiply
    99.34x = 149.28 × 92.86
  4. Step 4: Simplify right side
    99.34x = 13,862.14
  5. Step 5: Solve for x
    x = 13,862.14/99.34
  6. Step 6: Final answer
    x = 139.54

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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.