Home / 272,579.20-408,868.80-139,415.20

Finding the Fourth Proportional to 272,579.20, 408,868.80 and 139,415.20

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Solution

The fourth proportional to 272,579.20, 408,868.80 and 139,415.20 is: 209,122.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,579.20 : 408,868.80 = 139,415.20 : x
  2. Step 2: Convert to fraction form
    272,579.20/408,868.80 = 139,415.20/x
  3. Step 3: Cross multiply
    272,579.20x = 408,868.80 × 139,415.20
  4. Step 4: Simplify right side
    272,579.20x = 57,002,525,525.76
  5. Step 5: Solve for x
    x = 57,002,525,525.76/272,579.20
  6. Step 6: Final answer
    x = 209,122.80

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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.