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Finding the Fourth Proportional to 136,808.80, 204,982.80 and 128,514.40

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Solution

The fourth proportional to 136,808.80, 204,982.80 and 128,514.40 is: 192,555.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,808.80 : 204,982.80 = 128,514.40 : x
  2. Step 2: Convert to fraction form
    136,808.80/204,982.80 = 128,514.40/x
  3. Step 3: Cross multiply
    136,808.80x = 204,982.80 × 128,514.40
  4. Step 4: Simplify right side
    136,808.80x = 26,343,241,552.32
  5. Step 5: Solve for x
    x = 26,343,241,552.32/136,808.80
  6. Step 6: Final answer
    x = 192,555.17

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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.