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Finding the Fourth Proportional to 265,693.89, 398,618.47 and 85,775.09

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Solution

The fourth proportional to 265,693.89, 398,618.47 and 85,775.09 is: 128,687.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,693.89 : 398,618.47 = 85,775.09 : x
  2. Step 2: Convert to fraction form
    265,693.89/398,618.47 = 85,775.09/x
  3. Step 3: Cross multiply
    265,693.89x = 398,618.47 × 85,775.09
  4. Step 4: Simplify right side
    265,693.89x = 34,191,536,350.90
  5. Step 5: Solve for x
    x = 34,191,536,350.90/265,693.89
  6. Step 6: Final answer
    x = 128,687.71

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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.