Home / 205,009.30-307,557.15-86,619.70

Finding the Fourth Proportional to 205,009.30, 307,557.15 and 86,619.70

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Solution

The fourth proportional to 205,009.30, 307,557.15 and 86,619.70 is: 129,947.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,009.30 : 307,557.15 = 86,619.70 : x
  2. Step 2: Convert to fraction form
    205,009.30/307,557.15 = 86,619.70/x
  3. Step 3: Cross multiply
    205,009.30x = 307,557.15 × 86,619.70
  4. Step 4: Simplify right side
    205,009.30x = 26,640,508,065.86
  5. Step 5: Solve for x
    x = 26,640,508,065.86/205,009.30
  6. Step 6: Final answer
    x = 129,947.80

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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.