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Finding the Fourth Proportional to 45,257.28, 67,860 and 42,648

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Solution

The fourth proportional to 45,257.28, 67,860 and 42,648 is: 63,947.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,257.28 : 67,860 = 42,648 : x
  2. Step 2: Convert to fraction form
    45,257.28/67,860 = 42,648/x
  3. Step 3: Cross multiply
    45,257.28x = 67,860 × 42,648
  4. Step 4: Simplify right side
    45,257.28x = 2,894,093,280
  5. Step 5: Solve for x
    x = 2,894,093,280/45,257.28
  6. Step 6: Final answer
    x = 63,947.57

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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.