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Finding the Fourth Proportional to 220,579.81, 330,862.78 and 121,363.65

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Solution

The fourth proportional to 220,579.81, 330,862.78 and 121,363.65 is: 182,041.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,579.81 : 330,862.78 = 121,363.65 : x
  2. Step 2: Convert to fraction form
    220,579.81/330,862.78 = 121,363.65/x
  3. Step 3: Cross multiply
    220,579.81x = 330,862.78 × 121,363.65
  4. Step 4: Simplify right side
    220,579.81x = 40,154,714,629.95
  5. Step 5: Solve for x
    x = 40,154,714,629.95/220,579.81
  6. Step 6: Final answer
    x = 182,041.66

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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.