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Finding the Fourth Proportional to 153.13, 229.21 and 98.21

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Solution

The fourth proportional to 153.13, 229.21 and 98.21 is: 147.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.13 : 229.21 = 98.21 : x
  2. Step 2: Convert to fraction form
    153.13/229.21 = 98.21/x
  3. Step 3: Cross multiply
    153.13x = 229.21 × 98.21
  4. Step 4: Simplify right side
    153.13x = 22,511.70
  5. Step 5: Solve for x
    x = 22,511.70/153.13
  6. Step 6: Final answer
    x = 147.01

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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.