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Finding the Fourth Proportional to 91,857,478.60, 137,786,217.90 and 75,701,672.20

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Solution

The fourth proportional to 91,857,478.60, 137,786,217.90 and 75,701,672.20 is: 113,552,508.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,857,478.60 : 137,786,217.90 = 75,701,672.20 : x
  2. Step 2: Convert to fraction form
    91,857,478.60/137,786,217.90 = 75,701,672.20/x
  3. Step 3: Cross multiply
    91,857,478.60x = 137,786,217.90 × 75,701,672.20
  4. Step 4: Simplify right side
    91,857,478.60x = 10,430,647,101,143,574
  5. Step 5: Solve for x
    x = 10,430,647,101,143,574/91,857,478.60
  6. Step 6: Final answer
    x = 113,552,508.30

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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.