Home / 85,536,819.20-128,053,286.40-80,553,958.40

Finding the Fourth Proportional to 85,536,819.20, 128,053,286.40 and 80,553,958.40

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Solution

The fourth proportional to 85,536,819.20, 128,053,286.40 and 80,553,958.40 is: 120,593,671.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,536,819.20 : 128,053,286.40 = 80,553,958.40 : x
  2. Step 2: Convert to fraction form
    85,536,819.20/128,053,286.40 = 80,553,958.40/x
  3. Step 3: Cross multiply
    85,536,819.20x = 128,053,286.40 × 80,553,958.40
  4. Step 4: Simplify right side
    85,536,819.20x = 10,315,199,105,648,888
  5. Step 5: Solve for x
    x = 10,315,199,105,648,888/85,536,819.20
  6. Step 6: Final answer
    x = 120,593,671.85

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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.