Home / 259,614,007.20-389,421,010.80-77,861,185.20

Finding the Fourth Proportional to 259,614,007.20, 389,421,010.80 and 77,861,185.20

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Solution

The fourth proportional to 259,614,007.20, 389,421,010.80 and 77,861,185.20 is: 116,791,777.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,614,007.20 : 389,421,010.80 = 77,861,185.20 : x
  2. Step 2: Convert to fraction form
    259,614,007.20/389,421,010.80 = 77,861,185.20/x
  3. Step 3: Cross multiply
    259,614,007.20x = 389,421,010.80 × 77,861,185.20
  4. Step 4: Simplify right side
    259,614,007.20x = 30,320,781,442,670,004
  5. Step 5: Solve for x
    x = 30,320,781,442,670,004/259,614,007.20
  6. Step 6: Final answer
    x = 116,791,777.80

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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.