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Finding the Fourth Proportional to 83,269.60, 124,904.40 and 20,940.10

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Solution

The fourth proportional to 83,269.60, 124,904.40 and 20,940.10 is: 31,410.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,269.60 : 124,904.40 = 20,940.10 : x
  2. Step 2: Convert to fraction form
    83,269.60/124,904.40 = 20,940.10/x
  3. Step 3: Cross multiply
    83,269.60x = 124,904.40 × 20,940.10
  4. Step 4: Simplify right side
    83,269.60x = 2,615,510,626.44
  5. Step 5: Solve for x
    x = 2,615,510,626.44/83,269.60
  6. Step 6: Final answer
    x = 31,410.15

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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.