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Finding the Fourth Proportional to 100.62, 150.78 and 52.56

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Solution

The fourth proportional to 100.62, 150.78 and 52.56 is: 78.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    100.62 : 150.78 = 52.56 : x
  2. Step 2: Convert to fraction form
    100.62/150.78 = 52.56/x
  3. Step 3: Cross multiply
    100.62x = 150.78 × 52.56
  4. Step 4: Simplify right side
    100.62x = 7,925.00
  5. Step 5: Solve for x
    x = 7,925.00/100.62
  6. Step 6: Final answer
    x = 78.76

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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.