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Finding the Fourth Proportional to 53.56, 80.36 and 48.36

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Solution

The fourth proportional to 53.56, 80.36 and 48.36 is: 72.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.56 : 80.36 = 48.36 : x
  2. Step 2: Convert to fraction form
    53.56/80.36 = 48.36/x
  3. Step 3: Cross multiply
    53.56x = 80.36 × 48.36
  4. Step 4: Simplify right side
    53.56x = 3,886.21
  5. Step 5: Solve for x
    x = 3,886.21/53.56
  6. Step 6: Final answer
    x = 72.56

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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.