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Finding the Fourth Proportional to 113.40, 170.06 and 48.43

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Solution

The fourth proportional to 113.40, 170.06 and 48.43 is: 72.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.40 : 170.06 = 48.43 : x
  2. Step 2: Convert to fraction form
    113.40/170.06 = 48.43/x
  3. Step 3: Cross multiply
    113.40x = 170.06 × 48.43
  4. Step 4: Simplify right side
    113.40x = 8,236.48
  5. Step 5: Solve for x
    x = 8,236.48/113.40
  6. Step 6: Final answer
    x = 72.63

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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.