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Finding the Fourth Proportional to 45.56, 67.94 and 42.32

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Solution

The fourth proportional to 45.56, 67.94 and 42.32 is: 63.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    45.56 : 67.94 = 42.32 : x
  2. Step 2: Convert to fraction form
    45.56/67.94 = 42.32/x
  3. Step 3: Cross multiply
    45.56x = 67.94 × 42.32
  4. Step 4: Simplify right side
    45.56x = 2,875.22
  5. Step 5: Solve for x
    x = 2,875.22/45.56
  6. Step 6: Final answer
    x = 63.11

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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.