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Finding the Fourth Proportional to 72,504.60, 109,016.10 and 61,099.80

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Solution

The fourth proportional to 72,504.60, 109,016.10 and 61,099.80 is: 91,868.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,504.60 : 109,016.10 = 61,099.80 : x
  2. Step 2: Convert to fraction form
    72,504.60/109,016.10 = 61,099.80/x
  3. Step 3: Cross multiply
    72,504.60x = 109,016.10 × 61,099.80
  4. Step 4: Simplify right side
    72,504.60x = 6,660,861,906.78
  5. Step 5: Solve for x
    x = 6,660,861,906.78/72,504.60
  6. Step 6: Final answer
    x = 91,868.13

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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.