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Finding the Fourth Proportional to 206,863,889.60, 310,295,834.40 and 91,726,212.80

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Solution

The fourth proportional to 206,863,889.60, 310,295,834.40 and 91,726,212.80 is: 137,589,319.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,863,889.60 : 310,295,834.40 = 91,726,212.80 : x
  2. Step 2: Convert to fraction form
    206,863,889.60/310,295,834.40 = 91,726,212.80/x
  3. Step 3: Cross multiply
    206,863,889.60x = 310,295,834.40 × 91,726,212.80
  4. Step 4: Simplify right side
    206,863,889.60x = 28,462,261,737,127,956
  5. Step 5: Solve for x
    x = 28,462,261,737,127,956/206,863,889.60
  6. Step 6: Final answer
    x = 137,589,319.20

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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.