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Finding the Fourth Proportional to 153.67, 211.99 and 104.53

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Solution

The fourth proportional to 153.67, 211.99 and 104.53 is: 144.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.67 : 211.99 = 104.53 : x
  2. Step 2: Convert to fraction form
    153.67/211.99 = 104.53/x
  3. Step 3: Cross multiply
    153.67x = 211.99 × 104.53
  4. Step 4: Simplify right side
    153.67x = 22,159.31
  5. Step 5: Solve for x
    x = 22,159.31/153.67
  6. Step 6: Final answer
    x = 144.20

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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.