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Finding the Fourth Proportional to 99.36, 147.96 and 96.66

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Solution

The fourth proportional to 99.36, 147.96 and 96.66 is: 143.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.36 : 147.96 = 96.66 : x
  2. Step 2: Convert to fraction form
    99.36/147.96 = 96.66/x
  3. Step 3: Cross multiply
    99.36x = 147.96 × 96.66
  4. Step 4: Simplify right side
    99.36x = 14,301.81
  5. Step 5: Solve for x
    x = 14,301.81/99.36
  6. Step 6: Final answer
    x = 143.94

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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.