Home / 280,167,085.78-420,505,649.64-149,119,381.73

Finding the Fourth Proportional to 280,167,085.78, 420,505,649.64 and 149,119,381.73

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Solution

The fourth proportional to 280,167,085.78, 420,505,649.64 and 149,119,381.73 is: 223,814,807.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,167,085.78 : 420,505,649.64 = 149,119,381.73 : x
  2. Step 2: Convert to fraction form
    280,167,085.78/420,505,649.64 = 149,119,381.73/x
  3. Step 3: Cross multiply
    280,167,085.78x = 420,505,649.64 × 149,119,381.73
  4. Step 4: Simplify right side
    280,167,085.78x = 62,705,542,489,340,056
  5. Step 5: Solve for x
    x = 62,705,542,489,340,056/280,167,085.78
  6. Step 6: Final answer
    x = 223,814,807.92

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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.