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Finding the Fourth Proportional to 279,162,531.60, 418,759,543.80 and 85,080,278.40

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Solution

The fourth proportional to 279,162,531.60, 418,759,543.80 and 85,080,278.40 is: 127,625,216.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,162,531.60 : 418,759,543.80 = 85,080,278.40 : x
  2. Step 2: Convert to fraction form
    279,162,531.60/418,759,543.80 = 85,080,278.40/x
  3. Step 3: Cross multiply
    279,162,531.60x = 418,759,543.80 × 85,080,278.40
  4. Step 4: Simplify right side
    279,162,531.60x = 35,628,178,569,160,996
  5. Step 5: Solve for x
    x = 35,628,178,569,160,996/279,162,531.60
  6. Step 6: Final answer
    x = 127,625,216.63

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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.