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Finding the Fourth Proportional to 279,973.78, 419,960.98 and 69,611.74

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Solution

The fourth proportional to 279,973.78, 419,960.98 and 69,611.74 is: 104,417.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,973.78 : 419,960.98 = 69,611.74 : x
  2. Step 2: Convert to fraction form
    279,973.78/419,960.98 = 69,611.74/x
  3. Step 3: Cross multiply
    279,973.78x = 419,960.98 × 69,611.74
  4. Step 4: Simplify right side
    279,973.78x = 29,234,214,549.91
  5. Step 5: Solve for x
    x = 29,234,214,549.91/279,973.78
  6. Step 6: Final answer
    x = 104,417.69

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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.