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Finding the Fourth Proportional to 59.06, 81.42 and 40.64

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Solution

The fourth proportional to 59.06, 81.42 and 40.64 is: 56.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    59.06 : 81.42 = 40.64 : x
  2. Step 2: Convert to fraction form
    59.06/81.42 = 40.64/x
  3. Step 3: Cross multiply
    59.06x = 81.42 × 40.64
  4. Step 4: Simplify right side
    59.06x = 3,308.91
  5. Step 5: Solve for x
    x = 3,308.91/59.06
  6. Step 6: Final answer
    x = 56.03

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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.