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Finding the Fourth Proportional to 55.96, 83.90 and 40.70

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Solution

The fourth proportional to 55.96, 83.90 and 40.70 is: 61.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.96 : 83.90 = 40.70 : x
  2. Step 2: Convert to fraction form
    55.96/83.90 = 40.70/x
  3. Step 3: Cross multiply
    55.96x = 83.90 × 40.70
  4. Step 4: Simplify right side
    55.96x = 3,415.04
  5. Step 5: Solve for x
    x = 3,415.04/55.96
  6. Step 6: Final answer
    x = 61.03

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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.