Home / 515,121.20-772,669.72-136,068.39

Finding the Fourth Proportional to 515,121.20, 772,669.72 and 136,068.39

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Solution

The fourth proportional to 515,121.20, 772,669.72 and 136,068.39 is: 204,099.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,121.20 : 772,669.72 = 136,068.39 : x
  2. Step 2: Convert to fraction form
    515,121.20/772,669.72 = 136,068.39/x
  3. Step 3: Cross multiply
    515,121.20x = 772,669.72 × 136,068.39
  4. Step 4: Simplify right side
    515,121.20x = 105,135,923,496.14
  5. Step 5: Solve for x
    x = 105,135,923,496.14/515,121.20
  6. Step 6: Final answer
    x = 204,099.39

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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.