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Finding the Fourth Proportional to 134.85, 202.36 and 53.69

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Solution

The fourth proportional to 134.85, 202.36 and 53.69 is: 80.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.85 : 202.36 = 53.69 : x
  2. Step 2: Convert to fraction form
    134.85/202.36 = 53.69/x
  3. Step 3: Cross multiply
    134.85x = 202.36 × 53.69
  4. Step 4: Simplify right side
    134.85x = 10,864.71
  5. Step 5: Solve for x
    x = 10,864.71/134.85
  6. Step 6: Final answer
    x = 80.57

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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.