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Finding the Fourth Proportional to 170.87, 235.50 and 137.57

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Solution

The fourth proportional to 170.87, 235.50 and 137.57 is: 189.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.87 : 235.50 = 137.57 : x
  2. Step 2: Convert to fraction form
    170.87/235.50 = 137.57/x
  3. Step 3: Cross multiply
    170.87x = 235.50 × 137.57
  4. Step 4: Simplify right side
    170.87x = 32,397.74
  5. Step 5: Solve for x
    x = 32,397.74/170.87
  6. Step 6: Final answer
    x = 189.60

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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.