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Finding the Fourth Proportional to 48.66, 67.18 and 31.18

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Solution

The fourth proportional to 48.66, 67.18 and 31.18 is: 43.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.66 : 67.18 = 31.18 : x
  2. Step 2: Convert to fraction form
    48.66/67.18 = 31.18/x
  3. Step 3: Cross multiply
    48.66x = 67.18 × 31.18
  4. Step 4: Simplify right side
    48.66x = 2,094.87
  5. Step 5: Solve for x
    x = 2,094.87/48.66
  6. Step 6: Final answer
    x = 43.05

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.