Home / 279,936,740.80-419,905,111.20-85,846,614.40

Finding the Fourth Proportional to 279,936,740.80, 419,905,111.20 and 85,846,614.40

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Solution

The fourth proportional to 279,936,740.80, 419,905,111.20 and 85,846,614.40 is: 128,769,921.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,936,740.80 : 419,905,111.20 = 85,846,614.40 : x
  2. Step 2: Convert to fraction form
    279,936,740.80/419,905,111.20 = 85,846,614.40/x
  3. Step 3: Cross multiply
    279,936,740.80x = 419,905,111.20 × 85,846,614.40
  4. Step 4: Simplify right side
    279,936,740.80x = 36,047,432,165,775,520
  5. Step 5: Solve for x
    x = 36,047,432,165,775,520/279,936,740.80
  6. Step 6: Final answer
    x = 128,769,921.60

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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.