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Finding the Fourth Proportional to 48.68, 72.40 and 47.54

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Solution

The fourth proportional to 48.68, 72.40 and 47.54 is: 70.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.68 : 72.40 = 47.54 : x
  2. Step 2: Convert to fraction form
    48.68/72.40 = 47.54/x
  3. Step 3: Cross multiply
    48.68x = 72.40 × 47.54
  4. Step 4: Simplify right side
    48.68x = 3,441.90
  5. Step 5: Solve for x
    x = 3,441.90/48.68
  6. Step 6: Final answer
    x = 70.70

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.