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Finding the Fourth Proportional to 247,019.55, 340,871.16 and 138,132.87

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Solution

The fourth proportional to 247,019.55, 340,871.16 and 138,132.87 is: 190,614.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,019.55 : 340,871.16 = 138,132.87 : x
  2. Step 2: Convert to fraction form
    247,019.55/340,871.16 = 138,132.87/x
  3. Step 3: Cross multiply
    247,019.55x = 340,871.16 × 138,132.87
  4. Step 4: Simplify right side
    247,019.55x = 47,085,511,631.03
  5. Step 5: Solve for x
    x = 47,085,511,631.03/247,019.55
  6. Step 6: Final answer
    x = 190,614.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.