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Finding the Fourth Proportional to 323,141.20, 484,710.95 and 86,483.90

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Solution

The fourth proportional to 323,141.20, 484,710.95 and 86,483.90 is: 129,725.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,141.20 : 484,710.95 = 86,483.90 : x
  2. Step 2: Convert to fraction form
    323,141.20/484,710.95 = 86,483.90/x
  3. Step 3: Cross multiply
    323,141.20x = 484,710.95 × 86,483.90
  4. Step 4: Simplify right side
    323,141.20x = 41,919,694,756.69
  5. Step 5: Solve for x
    x = 41,919,694,756.69/323,141.20
  6. Step 6: Final answer
    x = 129,725.63

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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.