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Finding the Fourth Proportional to 53.93, 80.53 and 48.80

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Solution

The fourth proportional to 53.93, 80.53 and 48.80 is: 72.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.93 : 80.53 = 48.80 : x
  2. Step 2: Convert to fraction form
    53.93/80.53 = 48.80/x
  3. Step 3: Cross multiply
    53.93x = 80.53 × 48.80
  4. Step 4: Simplify right side
    53.93x = 3,929.94
  5. Step 5: Solve for x
    x = 3,929.94/53.93
  6. Step 6: Final answer
    x = 72.87

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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.