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Finding the Fourth Proportional to 340,081.40, 510,105.90 and 115,419.80

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Solution

The fourth proportional to 340,081.40, 510,105.90 and 115,419.80 is: 173,124.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,081.40 : 510,105.90 = 115,419.80 : x
  2. Step 2: Convert to fraction form
    340,081.40/510,105.90 = 115,419.80/x
  3. Step 3: Cross multiply
    340,081.40x = 510,105.90 × 115,419.80
  4. Step 4: Simplify right side
    340,081.40x = 58,876,320,956.82
  5. Step 5: Solve for x
    x = 58,876,320,956.82/340,081.40
  6. Step 6: Final answer
    x = 173,124.20

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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.