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Finding the Fourth Proportional to 107.66, 148.55 and 66.16

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Solution

The fourth proportional to 107.66, 148.55 and 66.16 is: 91.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.66 : 148.55 = 66.16 : x
  2. Step 2: Convert to fraction form
    107.66/148.55 = 66.16/x
  3. Step 3: Cross multiply
    107.66x = 148.55 × 66.16
  4. Step 4: Simplify right side
    107.66x = 9,827.33
  5. Step 5: Solve for x
    x = 9,827.33/107.66
  6. Step 6: Final answer
    x = 91.29

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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.