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Finding the Fourth Proportional to 99.17, 147.93 and 88.91

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Solution

The fourth proportional to 99.17, 147.93 and 88.91 is: 132.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.17 : 147.93 = 88.91 : x
  2. Step 2: Convert to fraction form
    99.17/147.93 = 88.91/x
  3. Step 3: Cross multiply
    99.17x = 147.93 × 88.91
  4. Step 4: Simplify right side
    99.17x = 13,152.46
  5. Step 5: Solve for x
    x = 13,152.46/99.17
  6. Step 6: Final answer
    x = 132.63

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.