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Finding the Fourth Proportional to 73.77, 101.72 and 51.66

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Solution

The fourth proportional to 73.77, 101.72 and 51.66 is: 71.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.77 : 101.72 = 51.66 : x
  2. Step 2: Convert to fraction form
    73.77/101.72 = 51.66/x
  3. Step 3: Cross multiply
    73.77x = 101.72 × 51.66
  4. Step 4: Simplify right side
    73.77x = 5,255.13
  5. Step 5: Solve for x
    x = 5,255.13/73.77
  6. Step 6: Final answer
    x = 71.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.