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Finding the Fourth Proportional to 83,100.60, 124,650.90 and 81,788.40

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Solution

The fourth proportional to 83,100.60, 124,650.90 and 81,788.40 is: 122,682.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,100.60 : 124,650.90 = 81,788.40 : x
  2. Step 2: Convert to fraction form
    83,100.60/124,650.90 = 81,788.40/x
  3. Step 3: Cross multiply
    83,100.60x = 124,650.90 × 81,788.40
  4. Step 4: Simplify right side
    83,100.60x = 10,194,997,669.56
  5. Step 5: Solve for x
    x = 10,194,997,669.56/83,100.60
  6. Step 6: Final answer
    x = 122,682.60

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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.