Home / 338,817.90-508,191.21-139,159.38

Finding the Fourth Proportional to 338,817.90, 508,191.21 and 139,159.38

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Solution

The fourth proportional to 338,817.90, 508,191.21 and 139,159.38 is: 208,724.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,817.90 : 508,191.21 = 139,159.38 : x
  2. Step 2: Convert to fraction form
    338,817.90/508,191.21 = 139,159.38/x
  3. Step 3: Cross multiply
    338,817.90x = 508,191.21 × 139,159.38
  4. Step 4: Simplify right side
    338,817.90x = 70,719,573,705.05
  5. Step 5: Solve for x
    x = 70,719,573,705.05/338,817.90
  6. Step 6: Final answer
    x = 208,724.43

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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.