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Finding the Fourth Proportional to 58.05, 79.74 and 51.66

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Solution

The fourth proportional to 58.05, 79.74 and 51.66 is: 70.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.05 : 79.74 = 51.66 : x
  2. Step 2: Convert to fraction form
    58.05/79.74 = 51.66/x
  3. Step 3: Cross multiply
    58.05x = 79.74 × 51.66
  4. Step 4: Simplify right side
    58.05x = 4,119.37
  5. Step 5: Solve for x
    x = 4,119.37/58.05
  6. Step 6: Final answer
    x = 70.96

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.