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Finding the Fourth Proportional to 136,809.30, 204,983.55 and 128,514.90

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Solution

The fourth proportional to 136,809.30, 204,983.55 and 128,514.90 is: 192,555.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,809.30 : 204,983.55 = 128,514.90 : x
  2. Step 2: Convert to fraction form
    136,809.30/204,983.55 = 128,514.90/x
  3. Step 3: Cross multiply
    136,809.30x = 204,983.55 × 128,514.90
  4. Step 4: Simplify right side
    136,809.30x = 26,343,440,429.90
  5. Step 5: Solve for x
    x = 26,343,440,429.90/136,809.30
  6. Step 6: Final answer
    x = 192,555.92

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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.