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Finding the Fourth Proportional to 53.51, 79.61 and 52.11

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Solution

The fourth proportional to 53.51, 79.61 and 52.11 is: 77.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.51 : 79.61 = 52.11 : x
  2. Step 2: Convert to fraction form
    53.51/79.61 = 52.11/x
  3. Step 3: Cross multiply
    53.51x = 79.61 × 52.11
  4. Step 4: Simplify right side
    53.51x = 4,148.22
  5. Step 5: Solve for x
    x = 4,148.22/53.51
  6. Step 6: Final answer
    x = 77.53

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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.