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Finding the Fourth Proportional to 57.19, 85.70 and 32.81

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Solution

The fourth proportional to 57.19, 85.70 and 32.81 is: 49.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.19 : 85.70 = 32.81 : x
  2. Step 2: Convert to fraction form
    57.19/85.70 = 32.81/x
  3. Step 3: Cross multiply
    57.19x = 85.70 × 32.81
  4. Step 4: Simplify right side
    57.19x = 2,811.82
  5. Step 5: Solve for x
    x = 2,811.82/57.19
  6. Step 6: Final answer
    x = 49.17

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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.