Home / 138,738,880.85-191,471,412.89-76,878,623.57

Finding the Fourth Proportional to 138,738,880.85, 191,471,412.89 and 76,878,623.57

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Solution

The fourth proportional to 138,738,880.85, 191,471,412.89 and 76,878,623.57 is: 106,099,015.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,738,880.85 : 191,471,412.89 = 76,878,623.57 : x
  2. Step 2: Convert to fraction form
    138,738,880.85/191,471,412.89 = 76,878,623.57/x
  3. Step 3: Cross multiply
    138,738,880.85x = 191,471,412.89 × 76,878,623.57
  4. Step 4: Simplify right side
    138,738,880.85x = 14,720,058,675,601,960
  5. Step 5: Solve for x
    x = 14,720,058,675,601,960/138,738,880.85
  6. Step 6: Final answer
    x = 106,099,015.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.