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Finding the Fourth Proportional to 101.69, 152.39 and 47.47

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Solution

The fourth proportional to 101.69, 152.39 and 47.47 is: 71.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.69 : 152.39 = 47.47 : x
  2. Step 2: Convert to fraction form
    101.69/152.39 = 47.47/x
  3. Step 3: Cross multiply
    101.69x = 152.39 × 47.47
  4. Step 4: Simplify right side
    101.69x = 7,233.95
  5. Step 5: Solve for x
    x = 7,233.95/101.69
  6. Step 6: Final answer
    x = 71.14

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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.