Home / 279,936,758.80-419,905,138.20-85,846,632.40

Finding the Fourth Proportional to 279,936,758.80, 419,905,138.20 and 85,846,632.40

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Solution

The fourth proportional to 279,936,758.80, 419,905,138.20 and 85,846,632.40 is: 128,769,948.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,936,758.80 : 419,905,138.20 = 85,846,632.40 : x
  2. Step 2: Convert to fraction form
    279,936,758.80/419,905,138.20 = 85,846,632.40/x
  3. Step 3: Cross multiply
    279,936,758.80x = 419,905,138.20 × 85,846,632.40
  4. Step 4: Simplify right side
    279,936,758.80x = 36,047,442,041,926,600
  5. Step 5: Solve for x
    x = 36,047,442,041,926,600/279,936,758.80
  6. Step 6: Final answer
    x = 128,769,948.60

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1.5x scale

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.