Home / 279,936,811.40-419,905,217.10-85,878,177.80

Finding the Fourth Proportional to 279,936,811.40, 419,905,217.10 and 85,878,177.80

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Solution

The fourth proportional to 279,936,811.40, 419,905,217.10 and 85,878,177.80 is: 128,817,266.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,936,811.40 : 419,905,217.10 = 85,878,177.80 : x
  2. Step 2: Convert to fraction form
    279,936,811.40/419,905,217.10 = 85,878,177.80/x
  3. Step 3: Cross multiply
    279,936,811.40x = 419,905,217.10 × 85,878,177.80
  4. Step 4: Simplify right side
    279,936,811.40x = 36,060,694,893,261,400
  5. Step 5: Solve for x
    x = 36,060,694,893,261,400/279,936,811.40
  6. Step 6: Final answer
    x = 128,817,266.70

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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.