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Finding the Fourth Proportional to 170.76, 235.68 and 143.07

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Solution

The fourth proportional to 170.76, 235.68 and 143.07 is: 197.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.76 : 235.68 = 143.07 : x
  2. Step 2: Convert to fraction form
    170.76/235.68 = 143.07/x
  3. Step 3: Cross multiply
    170.76x = 235.68 × 143.07
  4. Step 4: Simplify right side
    170.76x = 33,718.74
  5. Step 5: Solve for x
    x = 33,718.74/170.76
  6. Step 6: Final answer
    x = 197.46

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Find fourth proportional to 85.38, 117.84 and 71.54
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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.