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Finding the Fourth Proportional to 48.35, 66.70 and 29.92

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Solution

The fourth proportional to 48.35, 66.70 and 29.92 is: 41.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.35 : 66.70 = 29.92 : x
  2. Step 2: Convert to fraction form
    48.35/66.70 = 29.92/x
  3. Step 3: Cross multiply
    48.35x = 66.70 × 29.92
  4. Step 4: Simplify right side
    48.35x = 1,995.53
  5. Step 5: Solve for x
    x = 1,995.53/48.35
  6. Step 6: Final answer
    x = 41.28

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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.