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Finding the Fourth Proportional to 55.87, 83.87 and 45.61

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Solution

The fourth proportional to 55.87, 83.87 and 45.61 is: 68.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.87 : 83.87 = 45.61 : x
  2. Step 2: Convert to fraction form
    55.87/83.87 = 45.61/x
  3. Step 3: Cross multiply
    55.87x = 83.87 × 45.61
  4. Step 4: Simplify right side
    55.87x = 3,825.31
  5. Step 5: Solve for x
    x = 3,825.31/55.87
  6. Step 6: Final answer
    x = 68.47

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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.