Home / 81,077,392.45-121,810,105.72-51,988,223.71

Finding the Fourth Proportional to 81,077,392.45, 121,810,105.72 and 51,988,223.71

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Solution

The fourth proportional to 81,077,392.45, 121,810,105.72 and 51,988,223.71 is: 78,106,742.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,077,392.45 : 121,810,105.72 = 51,988,223.71 : x
  2. Step 2: Convert to fraction form
    81,077,392.45/121,810,105.72 = 51,988,223.71/x
  3. Step 3: Cross multiply
    81,077,392.45x = 121,810,105.72 × 51,988,223.71
  4. Step 4: Simplify right side
    81,077,392.45x = 6,332,691,025,550,002
  5. Step 5: Solve for x
    x = 6,332,691,025,550,002/81,077,392.45
  6. Step 6: Final answer
    x = 78,106,742.64

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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.