Home / 420,199.13-630,304.18-139,716.38

Finding the Fourth Proportional to 420,199.13, 630,304.18 and 139,716.38

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Solution

The fourth proportional to 420,199.13, 630,304.18 and 139,716.38 is: 209,576.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,199.13 : 630,304.18 = 139,716.38 : x
  2. Step 2: Convert to fraction form
    420,199.13/630,304.18 = 139,716.38/x
  3. Step 3: Cross multiply
    420,199.13x = 630,304.18 × 139,716.38
  4. Step 4: Simplify right side
    420,199.13x = 88,063,818,328.47
  5. Step 5: Solve for x
    x = 88,063,818,328.47/420,199.13
  6. Step 6: Final answer
    x = 209,576.39

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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.