Home / 100,690,972.70-138,914,198.28-56,627,870.78

Finding the Fourth Proportional to 100,690,972.70, 138,914,198.28 and 56,627,870.78

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Solution

The fourth proportional to 100,690,972.70, 138,914,198.28 and 56,627,870.78 is: 78,124,334.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,690,972.70 : 138,914,198.28 = 56,627,870.78 : x
  2. Step 2: Convert to fraction form
    100,690,972.70/138,914,198.28 = 56,627,870.78/x
  3. Step 3: Cross multiply
    100,690,972.70x = 138,914,198.28 × 56,627,870.78
  4. Step 4: Simplify right side
    100,690,972.70x = 7,866,415,269,707,138
  5. Step 5: Solve for x
    x = 7,866,415,269,707,138/100,690,972.70
  6. Step 6: Final answer
    x = 78,124,334.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.