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Finding the Fourth Proportional to 99.48, 149.94 and 89.88

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Solution

The fourth proportional to 99.48, 149.94 and 89.88 is: 135.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.48 : 149.94 = 89.88 : x
  2. Step 2: Convert to fraction form
    99.48/149.94 = 89.88/x
  3. Step 3: Cross multiply
    99.48x = 149.94 × 89.88
  4. Step 4: Simplify right side
    99.48x = 13,476.61
  5. Step 5: Solve for x
    x = 13,476.61/99.48
  6. Step 6: Final answer
    x = 135.47

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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.