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Finding the Fourth Proportional to 219,866.10, 329,799.15 and 70,105.20

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Solution

The fourth proportional to 219,866.10, 329,799.15 and 70,105.20 is: 105,157.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,866.10 : 329,799.15 = 70,105.20 : x
  2. Step 2: Convert to fraction form
    219,866.10/329,799.15 = 70,105.20/x
  3. Step 3: Cross multiply
    219,866.10x = 329,799.15 × 70,105.20
  4. Step 4: Simplify right side
    219,866.10x = 23,120,635,370.58
  5. Step 5: Solve for x
    x = 23,120,635,370.58/219,866.10
  6. Step 6: Final answer
    x = 105,157.80

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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.