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Finding the Fourth Proportional to 279,417.88, 419,122.74 and 69,055.84

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Solution

The fourth proportional to 279,417.88, 419,122.74 and 69,055.84 is: 103,582.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,417.88 : 419,122.74 = 69,055.84 : x
  2. Step 2: Convert to fraction form
    279,417.88/419,122.74 = 69,055.84/x
  3. Step 3: Cross multiply
    279,417.88x = 419,122.74 × 69,055.84
  4. Step 4: Simplify right side
    279,417.88x = 28,942,872,873.80
  5. Step 5: Solve for x
    x = 28,942,872,873.80/279,417.88
  6. Step 6: Final answer
    x = 103,582.75

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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.