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Finding the Fourth Proportional to 219,481.80, 302,869.17 and 128,841.45

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Solution

The fourth proportional to 219,481.80, 302,869.17 and 128,841.45 is: 177,791.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,481.80 : 302,869.17 = 128,841.45 : x
  2. Step 2: Convert to fraction form
    219,481.80/302,869.17 = 128,841.45/x
  3. Step 3: Cross multiply
    219,481.80x = 302,869.17 × 128,841.45
  4. Step 4: Simplify right side
    219,481.80x = 39,022,103,023.10
  5. Step 5: Solve for x
    x = 39,022,103,023.10/219,481.80
  6. Step 6: Final answer
    x = 177,791.98

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1.5x scale

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.