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Finding the Fourth Proportional to 219,804.20, 329,706.30 and 108,981.80

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Solution

The fourth proportional to 219,804.20, 329,706.30 and 108,981.80 is: 163,472.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,804.20 : 329,706.30 = 108,981.80 : x
  2. Step 2: Convert to fraction form
    219,804.20/329,706.30 = 108,981.80/x
  3. Step 3: Cross multiply
    219,804.20x = 329,706.30 × 108,981.80
  4. Step 4: Simplify right side
    219,804.20x = 35,931,986,045.34
  5. Step 5: Solve for x
    x = 35,931,986,045.34/219,804.20
  6. Step 6: Final answer
    x = 163,472.70

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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.