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Finding the Fourth Proportional to 323,947.78, 485,866.31 and 87,235.10

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Solution

The fourth proportional to 323,947.78, 485,866.31 and 87,235.10 is: 130,837.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,947.78 : 485,866.31 = 87,235.10 : x
  2. Step 2: Convert to fraction form
    323,947.78/485,866.31 = 87,235.10/x
  3. Step 3: Cross multiply
    323,947.78x = 485,866.31 × 87,235.10
  4. Step 4: Simplify right side
    323,947.78x = 42,384,597,075.84
  5. Step 5: Solve for x
    x = 42,384,597,075.84/323,947.78
  6. Step 6: Final answer
    x = 130,837.75

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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.