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Finding the Fourth Proportional to 45.59, 68.26 and 31.12

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Solution

The fourth proportional to 45.59, 68.26 and 31.12 is: 46.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    45.59 : 68.26 = 31.12 : x
  2. Step 2: Convert to fraction form
    45.59/68.26 = 31.12/x
  3. Step 3: Cross multiply
    45.59x = 68.26 × 31.12
  4. Step 4: Simplify right side
    45.59x = 2,124.50
  5. Step 5: Solve for x
    x = 2,124.50/45.59
  6. Step 6: Final answer
    x = 46.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.