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Finding the Fourth Proportional to 79.37, 118.56 and 57.51

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Solution

The fourth proportional to 79.37, 118.56 and 57.51 is: 85.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.37 : 118.56 = 57.51 : x
  2. Step 2: Convert to fraction form
    79.37/118.56 = 57.51/x
  3. Step 3: Cross multiply
    79.37x = 118.56 × 57.51
  4. Step 4: Simplify right side
    79.37x = 6,818.39
  5. Step 5: Solve for x
    x = 6,818.39/79.37
  6. Step 6: Final answer
    x = 85.91

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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.