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Finding the Fourth Proportional to 251,609.80, 377,414.70 and 139,635.40

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Solution

The fourth proportional to 251,609.80, 377,414.70 and 139,635.40 is: 209,453.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,609.80 : 377,414.70 = 139,635.40 : x
  2. Step 2: Convert to fraction form
    251,609.80/377,414.70 = 139,635.40/x
  3. Step 3: Cross multiply
    251,609.80x = 377,414.70 × 139,635.40
  4. Step 4: Simplify right side
    251,609.80x = 52,700,452,600.38
  5. Step 5: Solve for x
    x = 52,700,452,600.38/251,609.80
  6. Step 6: Final answer
    x = 209,453.10

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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.