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Finding the Fourth Proportional to 259,694.92, 390,227.35 and 139,840.49

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Solution

The fourth proportional to 259,694.92, 390,227.35 and 139,840.49 is: 210,129.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,694.92 : 390,227.35 = 139,840.49 : x
  2. Step 2: Convert to fraction form
    259,694.92/390,227.35 = 139,840.49/x
  3. Step 3: Cross multiply
    259,694.92x = 390,227.35 × 139,840.49
  4. Step 4: Simplify right side
    259,694.92x = 54,569,581,884.26
  5. Step 5: Solve for x
    x = 54,569,581,884.26/259,694.92
  6. Step 6: Final answer
    x = 210,129.57

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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.