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Finding the Fourth Proportional to 259,855,673.72, 389,807,470.74 and 84,979,614.80

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Solution

The fourth proportional to 259,855,673.72, 389,807,470.74 and 84,979,614.80 is: 127,477,257.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,855,673.72 : 389,807,470.74 = 84,979,614.80 : x
  2. Step 2: Convert to fraction form
    259,855,673.72/389,807,470.74 = 84,979,614.80/x
  3. Step 3: Cross multiply
    259,855,673.72x = 389,807,470.74 × 84,979,614.80
  4. Step 4: Simplify right side
    259,855,673.72x = 33,125,688,709,647,472
  5. Step 5: Solve for x
    x = 33,125,688,709,647,472/259,855,673.72
  6. Step 6: Final answer
    x = 127,477,257.80

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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.