Home / 205,012.80-307,562.40-86,623.20

Finding the Fourth Proportional to 205,012.80, 307,562.40 and 86,623.20

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Solution

The fourth proportional to 205,012.80, 307,562.40 and 86,623.20 is: 129,953.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,012.80 : 307,562.40 = 86,623.20 : x
  2. Step 2: Convert to fraction form
    205,012.80/307,562.40 = 86,623.20/x
  3. Step 3: Cross multiply
    205,012.80x = 307,562.40 × 86,623.20
  4. Step 4: Simplify right side
    205,012.80x = 26,642,039,287.68
  5. Step 5: Solve for x
    x = 26,642,039,287.68/205,012.80
  6. Step 6: Final answer
    x = 129,953.05

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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.