Home / 85,152,003.70-127,728,005.55-68,145,891.70

Finding the Fourth Proportional to 85,152,003.70, 127,728,005.55 and 68,145,891.70

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Solution

The fourth proportional to 85,152,003.70, 127,728,005.55 and 68,145,891.70 is: 102,218,837.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,152,003.70 : 127,728,005.55 = 68,145,891.70 : x
  2. Step 2: Convert to fraction form
    85,152,003.70/127,728,005.55 = 68,145,891.70/x
  3. Step 3: Cross multiply
    85,152,003.70x = 127,728,005.55 × 68,145,891.70
  4. Step 4: Simplify right side
    85,152,003.70x = 8,704,138,833,267,299
  5. Step 5: Solve for x
    x = 8,704,138,833,267,299/85,152,003.70
  6. Step 6: Final answer
    x = 102,218,837.55

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Similar ratio
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1.5x scale

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.