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Finding the Fourth Proportional to 67.02, 100.55 and 58.90

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Solution

The fourth proportional to 67.02, 100.55 and 58.90 is: 88.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.02 : 100.55 = 58.90 : x
  2. Step 2: Convert to fraction form
    67.02/100.55 = 58.90/x
  3. Step 3: Cross multiply
    67.02x = 100.55 × 58.90
  4. Step 4: Simplify right side
    67.02x = 5,922.40
  5. Step 5: Solve for x
    x = 5,922.40/67.02
  6. Step 6: Final answer
    x = 88.37

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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.