Home / 129,728,155.22-179,219,306.50-85,179,818.15

Finding the Fourth Proportional to 129,728,155.22, 179,219,306.50 and 85,179,818.15

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Solution

The fourth proportional to 129,728,155.22, 179,219,306.50 and 85,179,818.15 is: 117,675,826.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,728,155.22 : 179,219,306.50 = 85,179,818.15 : x
  2. Step 2: Convert to fraction form
    129,728,155.22/179,219,306.50 = 85,179,818.15/x
  3. Step 3: Cross multiply
    129,728,155.22x = 179,219,306.50 × 85,179,818.15
  4. Step 4: Simplify right side
    129,728,155.22x = 15,265,867,936,639,114
  5. Step 5: Solve for x
    x = 15,265,867,936,639,114/129,728,155.22
  6. Step 6: Final answer
    x = 117,675,826.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.