Home / 61,278,971.20-91,939,454.24-20,917,798.72

Finding the Fourth Proportional to 61,278,971.20, 91,939,454.24 and 20,917,798.72

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Solution

The fourth proportional to 61,278,971.20, 91,939,454.24 and 20,917,798.72 is: 31,383,865.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,278,971.20 : 91,939,454.24 = 20,917,798.72 : x
  2. Step 2: Convert to fraction form
    61,278,971.20/91,939,454.24 = 20,917,798.72/x
  3. Step 3: Cross multiply
    61,278,971.20x = 91,939,454.24 × 20,917,798.72
  4. Step 4: Simplify right side
    61,278,971.20x = 1,923,170,998,218,970.25
  5. Step 5: Solve for x
    x = 1,923,170,998,218,970.25/61,278,971.20
  6. Step 6: Final answer
    x = 31,383,865.63

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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.