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Finding the Fourth Proportional to 99.66, 149.43 and 48.24

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Solution

The fourth proportional to 99.66, 149.43 and 48.24 is: 72.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.66 : 149.43 = 48.24 : x
  2. Step 2: Convert to fraction form
    99.66/149.43 = 48.24/x
  3. Step 3: Cross multiply
    99.66x = 149.43 × 48.24
  4. Step 4: Simplify right side
    99.66x = 7,208.20
  5. Step 5: Solve for x
    x = 7,208.20/99.66
  6. Step 6: Final answer
    x = 72.33

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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.