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Finding the Fourth Proportional to 265,789.31, 398,685.51 and 66,109.73

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Solution

The fourth proportional to 265,789.31, 398,685.51 and 66,109.73 is: 99,164.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,789.31 : 398,685.51 = 66,109.73 : x
  2. Step 2: Convert to fraction form
    265,789.31/398,685.51 = 66,109.73/x
  3. Step 3: Cross multiply
    265,789.31x = 398,685.51 × 66,109.73
  4. Step 4: Simplify right side
    265,789.31x = 26,356,989,427.58
  5. Step 5: Solve for x
    x = 26,356,989,427.58/265,789.31
  6. Step 6: Final answer
    x = 99,164.97

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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.