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Finding the Fourth Proportional to 279,417.36, 419,121.96 and 69,055.32

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Solution

The fourth proportional to 279,417.36, 419,121.96 and 69,055.32 is: 103,581.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,417.36 : 419,121.96 = 69,055.32 : x
  2. Step 2: Convert to fraction form
    279,417.36/419,121.96 = 69,055.32/x
  3. Step 3: Cross multiply
    279,417.36x = 419,121.96 × 69,055.32
  4. Step 4: Simplify right side
    279,417.36x = 28,942,601,066.83
  5. Step 5: Solve for x
    x = 28,942,601,066.83/279,417.36
  6. Step 6: Final answer
    x = 103,581.97

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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.