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Finding the Fourth Proportional to 83,054.60, 124,581.90 and 81,110.60

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Solution

The fourth proportional to 83,054.60, 124,581.90 and 81,110.60 is: 121,665.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,054.60 : 124,581.90 = 81,110.60 : x
  2. Step 2: Convert to fraction form
    83,054.60/124,581.90 = 81,110.60/x
  3. Step 3: Cross multiply
    83,054.60x = 124,581.90 × 81,110.60
  4. Step 4: Simplify right side
    83,054.60x = 10,104,912,658.14
  5. Step 5: Solve for x
    x = 10,104,912,658.14/83,054.60
  6. Step 6: Final answer
    x = 121,665.90

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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.