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Finding the Fourth Proportional to 205,809.32, 308,488.78 and 105,975.51

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Solution

The fourth proportional to 205,809.32, 308,488.78 and 105,975.51 is: 158,847.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,809.32 : 308,488.78 = 105,975.51 : x
  2. Step 2: Convert to fraction form
    205,809.32/308,488.78 = 105,975.51/x
  3. Step 3: Cross multiply
    205,809.32x = 308,488.78 × 105,975.51
  4. Step 4: Simplify right side
    205,809.32x = 32,692,253,717.46
  5. Step 5: Solve for x
    x = 32,692,253,717.46/205,809.32
  6. Step 6: Final answer
    x = 158,847.29

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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.