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Finding the Fourth Proportional to 82,940.60, 124,410.90 and 20,611.10

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Solution

The fourth proportional to 82,940.60, 124,410.90 and 20,611.10 is: 30,916.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,940.60 : 124,410.90 = 20,611.10 : x
  2. Step 2: Convert to fraction form
    82,940.60/124,410.90 = 20,611.10/x
  3. Step 3: Cross multiply
    82,940.60x = 124,410.90 × 20,611.10
  4. Step 4: Simplify right side
    82,940.60x = 2,564,245,500.99
  5. Step 5: Solve for x
    x = 2,564,245,500.99/82,940.60
  6. Step 6: Final answer
    x = 30,916.65

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1.5x scale

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.