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Finding the Fourth Proportional to 172,979,479.20, 259,469,218.80 and 57,925,783.20

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Solution

The fourth proportional to 172,979,479.20, 259,469,218.80 and 57,925,783.20 is: 86,888,674.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,979,479.20 : 259,469,218.80 = 57,925,783.20 : x
  2. Step 2: Convert to fraction form
    172,979,479.20/259,469,218.80 = 57,925,783.20/x
  3. Step 3: Cross multiply
    172,979,479.20x = 259,469,218.80 × 57,925,783.20
  4. Step 4: Simplify right side
    172,979,479.20x = 15,029,957,715,282,166
  5. Step 5: Solve for x
    x = 15,029,957,715,282,166/172,979,479.20
  6. Step 6: Final answer
    x = 86,888,674.80

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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.