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Finding the Fourth Proportional to 100,819.30, 139,122.48 and 58,380.52

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Solution

The fourth proportional to 100,819.30, 139,122.48 and 58,380.52 is: 80,560.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,819.30 : 139,122.48 = 58,380.52 : x
  2. Step 2: Convert to fraction form
    100,819.30/139,122.48 = 58,380.52/x
  3. Step 3: Cross multiply
    100,819.30x = 139,122.48 × 58,380.52
  4. Step 4: Simplify right side
    100,819.30x = 8,122,042,726.09
  5. Step 5: Solve for x
    x = 8,122,042,726.09/100,819.30
  6. Step 6: Final answer
    x = 80,560.40

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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.