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Finding the Fourth Proportional to 219,803.70, 329,705.55 and 108,981.30

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Solution

The fourth proportional to 219,803.70, 329,705.55 and 108,981.30 is: 163,471.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,803.70 : 329,705.55 = 108,981.30 : x
  2. Step 2: Convert to fraction form
    219,803.70/329,705.55 = 108,981.30/x
  3. Step 3: Cross multiply
    219,803.70x = 329,705.55 × 108,981.30
  4. Step 4: Simplify right side
    219,803.70x = 35,931,739,456.22
  5. Step 5: Solve for x
    x = 35,931,739,456.22/219,803.70
  6. Step 6: Final answer
    x = 163,471.95

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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.