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Finding the Fourth Proportional to 245,993.81, 339,426.36 and 138,540.83

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Solution

The fourth proportional to 245,993.81, 339,426.36 and 138,540.83 is: 191,160.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,993.81 : 339,426.36 = 138,540.83 : x
  2. Step 2: Convert to fraction form
    245,993.81/339,426.36 = 138,540.83/x
  3. Step 3: Cross multiply
    245,993.81x = 339,426.36 × 138,540.83
  4. Step 4: Simplify right side
    245,993.81x = 47,024,407,941.15
  5. Step 5: Solve for x
    x = 47,024,407,941.15/245,993.81
  6. Step 6: Final answer
    x = 191,160.94

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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.