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Finding the Fourth Proportional to 158.71, 237.85 and 100.84

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Solution

The fourth proportional to 158.71, 237.85 and 100.84 is: 151.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.71 : 237.85 = 100.84 : x
  2. Step 2: Convert to fraction form
    158.71/237.85 = 100.84/x
  3. Step 3: Cross multiply
    158.71x = 237.85 × 100.84
  4. Step 4: Simplify right side
    158.71x = 23,984.79
  5. Step 5: Solve for x
    x = 23,984.79/158.71
  6. Step 6: Final answer
    x = 151.12

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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.