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Finding the Fourth Proportional to 205,619.88, 308,476.26 and 72,509.88

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Solution

The fourth proportional to 205,619.88, 308,476.26 and 72,509.88 is: 108,781.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,619.88 : 308,476.26 = 72,509.88 : x
  2. Step 2: Convert to fraction form
    205,619.88/308,476.26 = 72,509.88/x
  3. Step 3: Cross multiply
    205,619.88x = 308,476.26 × 72,509.88
  4. Step 4: Simplify right side
    205,619.88x = 22,367,576,595.45
  5. Step 5: Solve for x
    x = 22,367,576,595.45/205,619.88
  6. Step 6: Final answer
    x = 108,781.20

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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.