Home / 205,116.80-307,718.40-86,727.20

Finding the Fourth Proportional to 205,116.80, 307,718.40 and 86,727.20

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Solution

The fourth proportional to 205,116.80, 307,718.40 and 86,727.20 is: 130,109.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,116.80 : 307,718.40 = 86,727.20 : x
  2. Step 2: Convert to fraction form
    205,116.80/307,718.40 = 86,727.20/x
  3. Step 3: Cross multiply
    205,116.80x = 307,718.40 × 86,727.20
  4. Step 4: Simplify right side
    205,116.80x = 26,687,555,220.48
  5. Step 5: Solve for x
    x = 26,687,555,220.48/205,116.80
  6. Step 6: Final answer
    x = 130,109.07

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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.