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Finding the Fourth Proportional to 66.64, 100.36 and 62.16

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Solution

The fourth proportional to 66.64, 100.36 and 62.16 is: 93.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.64 : 100.36 = 62.16 : x
  2. Step 2: Convert to fraction form
    66.64/100.36 = 62.16/x
  3. Step 3: Cross multiply
    66.64x = 100.36 × 62.16
  4. Step 4: Simplify right side
    66.64x = 6,238.38
  5. Step 5: Solve for x
    x = 6,238.38/66.64
  6. Step 6: Final answer
    x = 93.61

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.