Home / 61,278,973.20-91,939,457.24-20,917,800.72

Finding the Fourth Proportional to 61,278,973.20, 91,939,457.24 and 20,917,800.72

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Solution

The fourth proportional to 61,278,973.20, 91,939,457.24 and 20,917,800.72 is: 31,383,868.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,278,973.20 : 91,939,457.24 = 20,917,800.72 : x
  2. Step 2: Convert to fraction form
    61,278,973.20/91,939,457.24 = 20,917,800.72/x
  3. Step 3: Cross multiply
    61,278,973.20x = 91,939,457.24 × 20,917,800.72
  4. Step 4: Simplify right side
    61,278,973.20x = 1,923,171,244,851,281
  5. Step 5: Solve for x
    x = 1,923,171,244,851,281/61,278,973.20
  6. Step 6: Final answer
    x = 31,383,868.63

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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.