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Finding the Fourth Proportional to 53.61, 80.07 and 48.75

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Solution

The fourth proportional to 53.61, 80.07 and 48.75 is: 72.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.61 : 80.07 = 48.75 : x
  2. Step 2: Convert to fraction form
    53.61/80.07 = 48.75/x
  3. Step 3: Cross multiply
    53.61x = 80.07 × 48.75
  4. Step 4: Simplify right side
    53.61x = 3,903.41
  5. Step 5: Solve for x
    x = 3,903.41/53.61
  6. Step 6: Final answer
    x = 72.81

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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.