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Finding the Fourth Proportional to 104.68, 144.53 and 72.01

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Solution

The fourth proportional to 104.68, 144.53 and 72.01 is: 99.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.68 : 144.53 = 72.01 : x
  2. Step 2: Convert to fraction form
    104.68/144.53 = 72.01/x
  3. Step 3: Cross multiply
    104.68x = 144.53 × 72.01
  4. Step 4: Simplify right side
    104.68x = 10,407.61
  5. Step 5: Solve for x
    x = 10,407.61/104.68
  6. Step 6: Final answer
    x = 99.42

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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.