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Finding the Fourth Proportional to 95.56, 143.07 and 66.64

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Solution

The fourth proportional to 95.56, 143.07 and 66.64 is: 99.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.56 : 143.07 = 66.64 : x
  2. Step 2: Convert to fraction form
    95.56/143.07 = 66.64/x
  3. Step 3: Cross multiply
    95.56x = 143.07 × 66.64
  4. Step 4: Simplify right side
    95.56x = 9,534.18
  5. Step 5: Solve for x
    x = 9,534.18/95.56
  6. Step 6: Final answer
    x = 99.77

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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.