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Finding the Fourth Proportional to 539,969.62, 810,000.94 and 140,611.12

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Solution

The fourth proportional to 539,969.62, 810,000.94 and 140,611.12 is: 210,928.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,969.62 : 810,000.94 = 140,611.12 : x
  2. Step 2: Convert to fraction form
    539,969.62/810,000.94 = 140,611.12/x
  3. Step 3: Cross multiply
    539,969.62x = 810,000.94 × 140,611.12
  4. Step 4: Simplify right side
    539,969.62x = 113,895,136,997.92
  5. Step 5: Solve for x
    x = 113,895,136,997.92/539,969.62
  6. Step 6: Final answer
    x = 210,928.79

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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.