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Finding the Fourth Proportional to 113.51, 170.07 and 82.50

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Solution

The fourth proportional to 113.51, 170.07 and 82.50 is: 123.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.51 : 170.07 = 82.50 : x
  2. Step 2: Convert to fraction form
    113.51/170.07 = 82.50/x
  3. Step 3: Cross multiply
    113.51x = 170.07 × 82.50
  4. Step 4: Simplify right side
    113.51x = 14,030.78
  5. Step 5: Solve for x
    x = 14,030.78/113.51
  6. Step 6: Final answer
    x = 123.61

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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.