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Finding the Fourth Proportional to 69,012,280.80, 103,430,503.80 and 36,679,672.80

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Solution

The fourth proportional to 69,012,280.80, 103,430,503.80 and 36,679,672.80 is: 54,972,781.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,012,280.80 : 103,430,503.80 = 36,679,672.80 : x
  2. Step 2: Convert to fraction form
    69,012,280.80/103,430,503.80 = 36,679,672.80/x
  3. Step 3: Cross multiply
    69,012,280.80x = 103,430,503.80 × 36,679,672.80
  4. Step 4: Simplify right side
    69,012,280.80x = 3,793,797,036,923,156
  5. Step 5: Solve for x
    x = 3,793,797,036,923,156/69,012,280.80
  6. Step 6: Final answer
    x = 54,972,781.55

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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.