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Finding the Fourth Proportional to 99.13, 147.95 and 88.19

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Solution

The fourth proportional to 99.13, 147.95 and 88.19 is: 131.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.13 : 147.95 = 88.19 : x
  2. Step 2: Convert to fraction form
    99.13/147.95 = 88.19/x
  3. Step 3: Cross multiply
    99.13x = 147.95 × 88.19
  4. Step 4: Simplify right side
    99.13x = 13,047.27
  5. Step 5: Solve for x
    x = 13,047.27/99.13
  6. Step 6: Final answer
    x = 131.62

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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.