Home / 261,279,847.30-391,928,259.36-77,031,872.90

Finding the Fourth Proportional to 261,279,847.30, 391,928,259.36 and 77,031,872.90

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Solution

The fourth proportional to 261,279,847.30, 391,928,259.36 and 77,031,872.90 is: 115,550,311.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,279,847.30 : 391,928,259.36 = 77,031,872.90 : x
  2. Step 2: Convert to fraction form
    261,279,847.30/391,928,259.36 = 77,031,872.90/x
  3. Step 3: Cross multiply
    261,279,847.30x = 391,928,259.36 × 77,031,872.90
  4. Step 4: Simplify right side
    261,279,847.30x = 30,190,967,861,620,032
  5. Step 5: Solve for x
    x = 30,190,967,861,620,032/261,279,847.30
  6. Step 6: Final answer
    x = 115,550,311.95

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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.