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Finding the Fourth Proportional to 245,859.72, 339,296.87 and 136,963.93

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Solution

The fourth proportional to 245,859.72, 339,296.87 and 136,963.93 is: 189,016.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,859.72 : 339,296.87 = 136,963.93 : x
  2. Step 2: Convert to fraction form
    245,859.72/339,296.87 = 136,963.93/x
  3. Step 3: Cross multiply
    245,859.72x = 339,296.87 × 136,963.93
  4. Step 4: Simplify right side
    245,859.72x = 46,471,432,751.90
  5. Step 5: Solve for x
    x = 46,471,432,751.90/245,859.72
  6. Step 6: Final answer
    x = 189,016.05

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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.