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Finding the Fourth Proportional to 58.78, 88.11 and 20.23

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Solution

The fourth proportional to 58.78, 88.11 and 20.23 is: 30.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.78 : 88.11 = 20.23 : x
  2. Step 2: Convert to fraction form
    58.78/88.11 = 20.23/x
  3. Step 3: Cross multiply
    58.78x = 88.11 × 20.23
  4. Step 4: Simplify right side
    58.78x = 1,781.92
  5. Step 5: Solve for x
    x = 1,781.92/58.78
  6. Step 6: Final answer
    x = 30.32

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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.