Home / 81,612,138.40-122,418,207.60-70,983,318.40

Finding the Fourth Proportional to 81,612,138.40, 122,418,207.60 and 70,983,318.40

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Solution

The fourth proportional to 81,612,138.40, 122,418,207.60 and 70,983,318.40 is: 106,474,977.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,612,138.40 : 122,418,207.60 = 70,983,318.40 : x
  2. Step 2: Convert to fraction form
    81,612,138.40/122,418,207.60 = 70,983,318.40/x
  3. Step 3: Cross multiply
    81,612,138.40x = 122,418,207.60 × 70,983,318.40
  4. Step 4: Simplify right side
    81,612,138.40x = 8,689,650,608,028,100
  5. Step 5: Solve for x
    x = 8,689,650,608,028,100/81,612,138.40
  6. Step 6: Final answer
    x = 106,474,977.60

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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.