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Finding the Fourth Proportional to 99.30, 149.68 and 95.18

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Solution

The fourth proportional to 99.30, 149.68 and 95.18 is: 143.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.30 : 149.68 = 95.18 : x
  2. Step 2: Convert to fraction form
    99.30/149.68 = 95.18/x
  3. Step 3: Cross multiply
    99.30x = 149.68 × 95.18
  4. Step 4: Simplify right side
    99.30x = 14,246.07
  5. Step 5: Solve for x
    x = 14,246.07/99.30
  6. Step 6: Final answer
    x = 143.46

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.