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Finding the Fourth Proportional to 48.57, 66.99 and 30.13

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Solution

The fourth proportional to 48.57, 66.99 and 30.13 is: 41.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.57 : 66.99 = 30.13 : x
  2. Step 2: Convert to fraction form
    48.57/66.99 = 30.13/x
  3. Step 3: Cross multiply
    48.57x = 66.99 × 30.13
  4. Step 4: Simplify right side
    48.57x = 2,018.41
  5. Step 5: Solve for x
    x = 2,018.41/48.57
  6. Step 6: Final answer
    x = 41.56

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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.