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Finding the Fourth Proportional to 66.93, 100.32 and 58.79

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Solution

The fourth proportional to 66.93, 100.32 and 58.79 is: 88.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.93 : 100.32 = 58.79 : x
  2. Step 2: Convert to fraction form
    66.93/100.32 = 58.79/x
  3. Step 3: Cross multiply
    66.93x = 100.32 × 58.79
  4. Step 4: Simplify right side
    66.93x = 5,897.81
  5. Step 5: Solve for x
    x = 5,897.81/66.93
  6. Step 6: Final answer
    x = 88.12

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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.