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Finding the Fourth Proportional to 45,078.87, 67,618.37 and 42,338.64

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Solution

The fourth proportional to 45,078.87, 67,618.37 and 42,338.64 is: 63,508.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,078.87 : 67,618.37 = 42,338.64 : x
  2. Step 2: Convert to fraction form
    45,078.87/67,618.37 = 42,338.64/x
  3. Step 3: Cross multiply
    45,078.87x = 67,618.37 × 42,338.64
  4. Step 4: Simplify right side
    45,078.87x = 2,862,869,824.82
  5. Step 5: Solve for x
    x = 2,862,869,824.82/45,078.87
  6. Step 6: Final answer
    x = 63,508.02

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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.