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Finding the Fourth Proportional to 139,872,001.20, 209,808,001.80 and 130,914,049.20

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Solution

The fourth proportional to 139,872,001.20, 209,808,001.80 and 130,914,049.20 is: 196,371,073.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,872,001.20 : 209,808,001.80 = 130,914,049.20 : x
  2. Step 2: Convert to fraction form
    139,872,001.20/209,808,001.80 = 130,914,049.20/x
  3. Step 3: Cross multiply
    139,872,001.20x = 209,808,001.80 × 130,914,049.20
  4. Step 4: Simplify right side
    139,872,001.20x = 27,466,815,070,198,892
  5. Step 5: Solve for x
    x = 27,466,815,070,198,892/139,872,001.20
  6. Step 6: Final answer
    x = 196,371,073.80

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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.