Home / 403,939.40-605,937.90-123,456.20

Finding the Fourth Proportional to 403,939.40, 605,937.90 and 123,456.20

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Solution

The fourth proportional to 403,939.40, 605,937.90 and 123,456.20 is: 185,193.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,939.40 : 605,937.90 = 123,456.20 : x
  2. Step 2: Convert to fraction form
    403,939.40/605,937.90 = 123,456.20/x
  3. Step 3: Cross multiply
    403,939.40x = 605,937.90 × 123,456.20
  4. Step 4: Simplify right side
    403,939.40x = 74,806,790,569.98
  5. Step 5: Solve for x
    x = 74,806,790,569.98/403,939.40
  6. Step 6: Final answer
    x = 185,193.10

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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.