Home / 265,905.06-398,857.38-78,916.56

Finding the Fourth Proportional to 265,905.06, 398,857.38 and 78,916.56

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Solution

The fourth proportional to 265,905.06, 398,857.38 and 78,916.56 is: 118,374.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,905.06 : 398,857.38 = 78,916.56 : x
  2. Step 2: Convert to fraction form
    265,905.06/398,857.38 = 78,916.56/x
  3. Step 3: Cross multiply
    265,905.06x = 398,857.38 × 78,916.56
  4. Step 4: Simplify right side
    265,905.06x = 31,476,452,360.21
  5. Step 5: Solve for x
    x = 31,476,452,360.21/265,905.06
  6. Step 6: Final answer
    x = 118,374.78

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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.