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Finding the Fourth Proportional to 158.43, 237.64 and 89.74

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Solution

The fourth proportional to 158.43, 237.64 and 89.74 is: 134.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.43 : 237.64 = 89.74 : x
  2. Step 2: Convert to fraction form
    158.43/237.64 = 89.74/x
  3. Step 3: Cross multiply
    158.43x = 237.64 × 89.74
  4. Step 4: Simplify right side
    158.43x = 21,325.81
  5. Step 5: Solve for x
    x = 21,325.81/158.43
  6. Step 6: Final answer
    x = 134.61

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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.