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Finding the Fourth Proportional to 104.74, 144.54 and 61.10

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Solution

The fourth proportional to 104.74, 144.54 and 61.10 is: 84.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.74 : 144.54 = 61.10 : x
  2. Step 2: Convert to fraction form
    104.74/144.54 = 61.10/x
  3. Step 3: Cross multiply
    104.74x = 144.54 × 61.10
  4. Step 4: Simplify right side
    104.74x = 8,830.67
  5. Step 5: Solve for x
    x = 8,830.67/104.74
  6. Step 6: Final answer
    x = 84.31

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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.