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Finding the Fourth Proportional to 58.68, 81.09 and 43.16

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Solution

The fourth proportional to 58.68, 81.09 and 43.16 is: 59.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.68 : 81.09 = 43.16 : x
  2. Step 2: Convert to fraction form
    58.68/81.09 = 43.16/x
  3. Step 3: Cross multiply
    58.68x = 81.09 × 43.16
  4. Step 4: Simplify right side
    58.68x = 3,499.44
  5. Step 5: Solve for x
    x = 3,499.44/58.68
  6. Step 6: Final answer
    x = 59.64

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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.