Home / 258,631.80-387,947.70-71,643.30

Finding the Fourth Proportional to 258,631.80, 387,947.70 and 71,643.30

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Solution

The fourth proportional to 258,631.80, 387,947.70 and 71,643.30 is: 107,464.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,631.80 : 387,947.70 = 71,643.30 : x
  2. Step 2: Convert to fraction form
    258,631.80/387,947.70 = 71,643.30/x
  3. Step 3: Cross multiply
    258,631.80x = 387,947.70 × 71,643.30
  4. Step 4: Simplify right side
    258,631.80x = 27,793,853,455.41
  5. Step 5: Solve for x
    x = 27,793,853,455.41/258,631.80
  6. Step 6: Final answer
    x = 107,464.95

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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.