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Finding the Fourth Proportional to 279,508.88, 419,258.36 and 69,146.80

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Solution

The fourth proportional to 279,508.88, 419,258.36 and 69,146.80 is: 103,718.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,508.88 : 419,258.36 = 69,146.80 : x
  2. Step 2: Convert to fraction form
    279,508.88/419,258.36 = 69,146.80/x
  3. Step 3: Cross multiply
    279,508.88x = 419,258.36 × 69,146.80
  4. Step 4: Simplify right side
    279,508.88x = 28,990,373,967.25
  5. Step 5: Solve for x
    x = 28,990,373,967.25/279,508.88
  6. Step 6: Final answer
    x = 103,718.97

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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.