Home / 81,077,409.50-121,810,131.32-51,988,240.76

Finding the Fourth Proportional to 81,077,409.50, 121,810,131.32 and 51,988,240.76

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Solution

The fourth proportional to 81,077,409.50, 121,810,131.32 and 51,988,240.76 is: 78,106,768.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,077,409.50 : 121,810,131.32 = 51,988,240.76 : x
  2. Step 2: Convert to fraction form
    81,077,409.50/121,810,131.32 = 51,988,240.76/x
  3. Step 3: Cross multiply
    81,077,409.50x = 121,810,131.32 × 51,988,240.76
  4. Step 4: Simplify right side
    81,077,409.50x = 6,332,694,433,202,385
  5. Step 5: Solve for x
    x = 6,332,694,433,202,385/81,077,409.50
  6. Step 6: Final answer
    x = 78,106,768.24

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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.