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Finding the Fourth Proportional to 220,812, 304,721.28 and 120,210.72

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Solution

The fourth proportional to 220,812, 304,721.28 and 120,210.72 is: 165,891.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,812 : 304,721.28 = 120,210.72 : x
  2. Step 2: Convert to fraction form
    220,812/304,721.28 = 120,210.72/x
  3. Step 3: Cross multiply
    220,812x = 304,721.28 × 120,210.72
  4. Step 4: Simplify right side
    220,812x = 36,630,764,468.12
  5. Step 5: Solve for x
    x = 36,630,764,468.12/220,812
  6. Step 6: Final answer
    x = 165,891.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.