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Finding the Fourth Proportional to 219,615.60, 329,423.40 and 86,423.52

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Solution

The fourth proportional to 219,615.60, 329,423.40 and 86,423.52 is: 129,635.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,615.60 : 329,423.40 = 86,423.52 : x
  2. Step 2: Convert to fraction form
    219,615.60/329,423.40 = 86,423.52/x
  3. Step 3: Cross multiply
    219,615.60x = 329,423.40 × 86,423.52
  4. Step 4: Simplify right side
    219,615.60x = 28,469,929,798.37
  5. Step 5: Solve for x
    x = 28,469,929,798.37/219,615.60
  6. Step 6: Final answer
    x = 129,635.28

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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.