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Finding the Fourth Proportional to 53.63, 79.81 and 51.71

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Solution

The fourth proportional to 53.63, 79.81 and 51.71 is: 76.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.63 : 79.81 = 51.71 : x
  2. Step 2: Convert to fraction form
    53.63/79.81 = 51.71/x
  3. Step 3: Cross multiply
    53.63x = 79.81 × 51.71
  4. Step 4: Simplify right side
    53.63x = 4,127.10
  5. Step 5: Solve for x
    x = 4,127.10/53.63
  6. Step 6: Final answer
    x = 76.96

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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.