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Finding the Fourth Proportional to 104.28, 155.55 and 98.07

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Solution

The fourth proportional to 104.28, 155.55 and 98.07 is: 146.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.28 : 155.55 = 98.07 : x
  2. Step 2: Convert to fraction form
    104.28/155.55 = 98.07/x
  3. Step 3: Cross multiply
    104.28x = 155.55 × 98.07
  4. Step 4: Simplify right side
    104.28x = 15,254.79
  5. Step 5: Solve for x
    x = 15,254.79/104.28
  6. Step 6: Final answer
    x = 146.29

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.