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Finding the Fourth Proportional to 240,468.78, 331,953.21 and 143,706.78

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Solution

The fourth proportional to 240,468.78, 331,953.21 and 143,706.78 is: 198,378.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    240,468.78 : 331,953.21 = 143,706.78 : x
  2. Step 2: Convert to fraction form
    240,468.78/331,953.21 = 143,706.78/x
  3. Step 3: Cross multiply
    240,468.78x = 331,953.21 × 143,706.78
  4. Step 4: Simplify right side
    240,468.78x = 47,703,926,919.76
  5. Step 5: Solve for x
    x = 47,703,926,919.76/240,468.78
  6. Step 6: Final answer
    x = 198,378.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.