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Finding the Fourth Proportional to 125,819.60, 188,401.35 and 81,204.80

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Solution

The fourth proportional to 125,819.60, 188,401.35 and 81,204.80 is: 121,595.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,819.60 : 188,401.35 = 81,204.80 : x
  2. Step 2: Convert to fraction form
    125,819.60/188,401.35 = 81,204.80/x
  3. Step 3: Cross multiply
    125,819.60x = 188,401.35 × 81,204.80
  4. Step 4: Simplify right side
    125,819.60x = 15,299,093,946.48
  5. Step 5: Solve for x
    x = 15,299,093,946.48/125,819.60
  6. Step 6: Final answer
    x = 121,595.47

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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.