Home / 128,520,855.20-192,805,718.88-42,284,120.96

Finding the Fourth Proportional to 128,520,855.20, 192,805,718.88 and 42,284,120.96

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Solution

The fourth proportional to 128,520,855.20, 192,805,718.88 and 42,284,120.96 is: 63,434,221.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,520,855.20 : 192,805,718.88 = 42,284,120.96 : x
  2. Step 2: Convert to fraction form
    128,520,855.20/192,805,718.88 = 42,284,120.96/x
  3. Step 3: Cross multiply
    128,520,855.20x = 192,805,718.88 × 42,284,120.96
  4. Step 4: Simplify right side
    128,520,855.20x = 8,152,620,338,901,676
  5. Step 5: Solve for x
    x = 8,152,620,338,901,676/128,520,855.20
  6. Step 6: Final answer
    x = 63,434,221.05

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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.