Home / 205,865.40-308,769.30-65,638.20

Finding the Fourth Proportional to 205,865.40, 308,769.30 and 65,638.20

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Solution

The fourth proportional to 205,865.40, 308,769.30 and 65,638.20 is: 98,448.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,865.40 : 308,769.30 = 65,638.20 : x
  2. Step 2: Convert to fraction form
    205,865.40/308,769.30 = 65,638.20/x
  3. Step 3: Cross multiply
    205,865.40x = 308,769.30 × 65,638.20
  4. Step 4: Simplify right side
    205,865.40x = 20,267,061,067.26
  5. Step 5: Solve for x
    x = 20,267,061,067.26/205,865.40
  6. Step 6: Final answer
    x = 98,448.12

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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.