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Finding the Fourth Proportional to 323,825.80, 485,731.40 and 87,171.36

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Solution

The fourth proportional to 323,825.80, 485,731.40 and 87,171.36 is: 130,755.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,825.80 : 485,731.40 = 87,171.36 : x
  2. Step 2: Convert to fraction form
    323,825.80/485,731.40 = 87,171.36/x
  3. Step 3: Cross multiply
    323,825.80x = 485,731.40 × 87,171.36
  4. Step 4: Simplify right side
    323,825.80x = 42,341,866,732.70
  5. Step 5: Solve for x
    x = 42,341,866,732.70/323,825.80
  6. Step 6: Final answer
    x = 130,755.07

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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.