Home / 420,204.02-630,311.52-139,721.30

Finding the Fourth Proportional to 420,204.02, 630,311.52 and 139,721.30

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Solution

The fourth proportional to 420,204.02, 630,311.52 and 139,721.30 is: 209,583.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,204.02 : 630,311.52 = 139,721.30 : x
  2. Step 2: Convert to fraction form
    420,204.02/630,311.52 = 139,721.30/x
  3. Step 3: Cross multiply
    420,204.02x = 630,311.52 × 139,721.30
  4. Step 4: Simplify right side
    420,204.02x = 88,067,944,979.38
  5. Step 5: Solve for x
    x = 88,067,944,979.38/420,204.02
  6. Step 6: Final answer
    x = 209,583.78

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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.