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Finding the Fourth Proportional to 158.76, 218.61 and 140.94

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Solution

The fourth proportional to 158.76, 218.61 and 140.94 is: 194.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.76 : 218.61 = 140.94 : x
  2. Step 2: Convert to fraction form
    158.76/218.61 = 140.94/x
  3. Step 3: Cross multiply
    158.76x = 218.61 × 140.94
  4. Step 4: Simplify right side
    158.76x = 30,810.89
  5. Step 5: Solve for x
    x = 30,810.89/158.76
  6. Step 6: Final answer
    x = 194.07

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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.