Home / 132,897,138.40-199,345,707.60-81,612,863.20

Finding the Fourth Proportional to 132,897,138.40, 199,345,707.60 and 81,612,863.20

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Solution

The fourth proportional to 132,897,138.40, 199,345,707.60 and 81,612,863.20 is: 122,419,294.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,897,138.40 : 199,345,707.60 = 81,612,863.20 : x
  2. Step 2: Convert to fraction form
    132,897,138.40/199,345,707.60 = 81,612,863.20/x
  3. Step 3: Cross multiply
    132,897,138.40x = 199,345,707.60 × 81,612,863.20
  4. Step 4: Simplify right side
    132,897,138.40x = 16,269,173,963,866,000
  5. Step 5: Solve for x
    x = 16,269,173,963,866,000/132,897,138.40
  6. Step 6: Final answer
    x = 122,419,294.80

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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.