Home / 279,947,634.40-419,921,451.60-85,889,000.80

Finding the Fourth Proportional to 279,947,634.40, 419,921,451.60 and 85,889,000.80

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Solution

The fourth proportional to 279,947,634.40, 419,921,451.60 and 85,889,000.80 is: 128,833,501.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,947,634.40 : 419,921,451.60 = 85,889,000.80 : x
  2. Step 2: Convert to fraction form
    279,947,634.40/419,921,451.60 = 85,889,000.80/x
  3. Step 3: Cross multiply
    279,947,634.40x = 419,921,451.60 × 85,889,000.80
  4. Step 4: Simplify right side
    279,947,634.40x = 36,066,633,892,409,560
  5. Step 5: Solve for x
    x = 36,066,633,892,409,560/279,947,634.40
  6. Step 6: Final answer
    x = 128,833,501.20

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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.