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Finding the Fourth Proportional to 170.68, 235.22 and 139.50

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Solution

The fourth proportional to 170.68, 235.22 and 139.50 is: 192.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.68 : 235.22 = 139.50 : x
  2. Step 2: Convert to fraction form
    170.68/235.22 = 139.50/x
  3. Step 3: Cross multiply
    170.68x = 235.22 × 139.50
  4. Step 4: Simplify right side
    170.68x = 32,813.19
  5. Step 5: Solve for x
    x = 32,813.19/170.68
  6. Step 6: Final answer
    x = 192.25

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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.