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Finding the Fourth Proportional to 48.01, 72.10 and 38.90

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Solution

The fourth proportional to 48.01, 72.10 and 38.90 is: 58.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.01 : 72.10 = 38.90 : x
  2. Step 2: Convert to fraction form
    48.01/72.10 = 38.90/x
  3. Step 3: Cross multiply
    48.01x = 72.10 × 38.90
  4. Step 4: Simplify right side
    48.01x = 2,804.72
  5. Step 5: Solve for x
    x = 2,804.72/48.01
  6. Step 6: Final answer
    x = 58.42

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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.