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Finding the Fourth Proportional to 219,819.99, 329,508.45 and 86,648.70

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Solution

The fourth proportional to 219,819.99, 329,508.45 and 86,648.70 is: 129,885.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,819.99 : 329,508.45 = 86,648.70 : x
  2. Step 2: Convert to fraction form
    219,819.99/329,508.45 = 86,648.70/x
  3. Step 3: Cross multiply
    219,819.99x = 329,508.45 × 86,648.70
  4. Step 4: Simplify right side
    219,819.99x = 28,551,478,831.52
  5. Step 5: Solve for x
    x = 28,551,478,831.52/219,819.99
  6. Step 6: Final answer
    x = 129,885.73

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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.