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Finding the Fourth Proportional to 220,356, 330,585.84 and 72,612

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Solution

The fourth proportional to 220,356, 330,585.84 and 72,612 is: 108,935.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,356 : 330,585.84 = 72,612 : x
  2. Step 2: Convert to fraction form
    220,356/330,585.84 = 72,612/x
  3. Step 3: Cross multiply
    220,356x = 330,585.84 × 72,612
  4. Step 4: Simplify right side
    220,356x = 24,004,499,014.08
  5. Step 5: Solve for x
    x = 24,004,499,014.08/220,356
  6. Step 6: Final answer
    x = 108,935.08

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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.