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Finding the Fourth Proportional to 279,518.45, 419,272.61 and 69,156.32

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Solution

The fourth proportional to 279,518.45, 419,272.61 and 69,156.32 is: 103,733.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,518.45 : 419,272.61 = 69,156.32 : x
  2. Step 2: Convert to fraction form
    279,518.45/419,272.61 = 69,156.32/x
  3. Step 3: Cross multiply
    279,518.45x = 419,272.61 × 69,156.32
  4. Step 4: Simplify right side
    279,518.45x = 28,995,348,342.25
  5. Step 5: Solve for x
    x = 28,995,348,342.25/279,518.45
  6. Step 6: Final answer
    x = 103,733.22

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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.