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Finding the Fourth Proportional to 132,857,761.80, 199,286,642.70 and 81,573,486.60

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Solution

The fourth proportional to 132,857,761.80, 199,286,642.70 and 81,573,486.60 is: 122,360,229.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,857,761.80 : 199,286,642.70 = 81,573,486.60 : x
  2. Step 2: Convert to fraction form
    132,857,761.80/199,286,642.70 = 81,573,486.60/x
  3. Step 3: Cross multiply
    132,857,761.80x = 199,286,642.70 × 81,573,486.60
  4. Step 4: Simplify right side
    132,857,761.80x = 16,256,506,277,847,436
  5. Step 5: Solve for x
    x = 16,256,506,277,847,436/132,857,761.80
  6. Step 6: Final answer
    x = 122,360,229.90

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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.