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Finding the Fourth Proportional to 113.32, 170.08 and 52.50

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Solution

The fourth proportional to 113.32, 170.08 and 52.50 is: 78.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.32 : 170.08 = 52.50 : x
  2. Step 2: Convert to fraction form
    113.32/170.08 = 52.50/x
  3. Step 3: Cross multiply
    113.32x = 170.08 × 52.50
  4. Step 4: Simplify right side
    113.32x = 8,929.20
  5. Step 5: Solve for x
    x = 8,929.20/113.32
  6. Step 6: Final answer
    x = 78.80

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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.