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Finding the Fourth Proportional to 136,702.80, 204,955.78 and 84,003.40

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Solution

The fourth proportional to 136,702.80, 204,955.78 and 84,003.40 is: 125,944.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,702.80 : 204,955.78 = 84,003.40 : x
  2. Step 2: Convert to fraction form
    136,702.80/204,955.78 = 84,003.40/x
  3. Step 3: Cross multiply
    136,702.80x = 204,955.78 × 84,003.40
  4. Step 4: Simplify right side
    136,702.80x = 17,216,982,369.65
  5. Step 5: Solve for x
    x = 17,216,982,369.65/136,702.80
  6. Step 6: Final answer
    x = 125,944.62

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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.