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Finding the Fourth Proportional to 84.55, 116.56 and 66.10

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Solution

The fourth proportional to 84.55, 116.56 and 66.10 is: 91.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.55 : 116.56 = 66.10 : x
  2. Step 2: Convert to fraction form
    84.55/116.56 = 66.10/x
  3. Step 3: Cross multiply
    84.55x = 116.56 × 66.10
  4. Step 4: Simplify right side
    84.55x = 7,704.81
  5. Step 5: Solve for x
    x = 7,704.81/84.55
  6. Step 6: Final answer
    x = 91.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.