Home / 272,629.20-408,943.80-139,465.20

Finding the Fourth Proportional to 272,629.20, 408,943.80 and 139,465.20

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Solution

The fourth proportional to 272,629.20, 408,943.80 and 139,465.20 is: 209,197.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,629.20 : 408,943.80 = 139,465.20 : x
  2. Step 2: Convert to fraction form
    272,629.20/408,943.80 = 139,465.20/x
  3. Step 3: Cross multiply
    272,629.20x = 408,943.80 × 139,465.20
  4. Step 4: Simplify right side
    272,629.20x = 57,033,428,855.76
  5. Step 5: Solve for x
    x = 57,033,428,855.76/272,629.20
  6. Step 6: Final answer
    x = 209,197.80

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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.