Home / 420,131.26-630,197.03-139,648.51

Finding the Fourth Proportional to 420,131.26, 630,197.03 and 139,648.51

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Solution

The fourth proportional to 420,131.26, 630,197.03 and 139,648.51 is: 209,472.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,131.26 : 630,197.03 = 139,648.51 : x
  2. Step 2: Convert to fraction form
    420,131.26/630,197.03 = 139,648.51/x
  3. Step 3: Cross multiply
    420,131.26x = 630,197.03 × 139,648.51
  4. Step 4: Simplify right side
    420,131.26x = 88,006,076,245.93
  5. Step 5: Solve for x
    x = 88,006,076,245.93/420,131.26
  6. Step 6: Final answer
    x = 209,472.81

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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.