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Finding the Fourth Proportional to 105.46, 158.08 and 56.66

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Solution

The fourth proportional to 105.46, 158.08 and 56.66 is: 84.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    105.46 : 158.08 = 56.66 : x
  2. Step 2: Convert to fraction form
    105.46/158.08 = 56.66/x
  3. Step 3: Cross multiply
    105.46x = 158.08 × 56.66
  4. Step 4: Simplify right side
    105.46x = 8,956.27
  5. Step 5: Solve for x
    x = 8,956.27/105.46
  6. Step 6: Final answer
    x = 84.93

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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.