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Finding the Fourth Proportional to 312,414.51, 468,621.63 and 75,757.15

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Solution

The fourth proportional to 312,414.51, 468,621.63 and 75,757.15 is: 113,635.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,414.51 : 468,621.63 = 75,757.15 : x
  2. Step 2: Convert to fraction form
    312,414.51/468,621.63 = 75,757.15/x
  3. Step 3: Cross multiply
    312,414.51x = 468,621.63 × 75,757.15
  4. Step 4: Simplify right side
    312,414.51x = 35,501,437,945.60
  5. Step 5: Solve for x
    x = 35,501,437,945.60/312,414.51
  6. Step 6: Final answer
    x = 113,635.69

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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.