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Finding the Fourth Proportional to 323,949.78, 485,869.31 and 87,237.10

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Solution

The fourth proportional to 323,949.78, 485,869.31 and 87,237.10 is: 130,840.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,949.78 : 485,869.31 = 87,237.10 : x
  2. Step 2: Convert to fraction form
    323,949.78/485,869.31 = 87,237.10/x
  3. Step 3: Cross multiply
    323,949.78x = 485,869.31 × 87,237.10
  4. Step 4: Simplify right side
    323,949.78x = 42,385,829,583.40
  5. Step 5: Solve for x
    x = 42,385,829,583.40/323,949.78
  6. Step 6: Final answer
    x = 130,840.74

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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.