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Finding the Fourth Proportional to 76.51, 105.59 and 43.77

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Solution

The fourth proportional to 76.51, 105.59 and 43.77 is: 60.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.51 : 105.59 = 43.77 : x
  2. Step 2: Convert to fraction form
    76.51/105.59 = 43.77/x
  3. Step 3: Cross multiply
    76.51x = 105.59 × 43.77
  4. Step 4: Simplify right side
    76.51x = 4,621.78
  5. Step 5: Solve for x
    x = 4,621.78/76.51
  6. Step 6: Final answer
    x = 60.41

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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.