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Finding the Fourth Proportional to 77.55, 115.81 and 62.28

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Solution

The fourth proportional to 77.55, 115.81 and 62.28 is: 93.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    77.55 : 115.81 = 62.28 : x
  2. Step 2: Convert to fraction form
    77.55/115.81 = 62.28/x
  3. Step 3: Cross multiply
    77.55x = 115.81 × 62.28
  4. Step 4: Simplify right side
    77.55x = 7,212.49
  5. Step 5: Solve for x
    x = 7,212.49/77.55
  6. Step 6: Final answer
    x = 93.01

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.