Home / 138,981.56-191,791.60-78,544.22

Finding the Fourth Proportional to 138,981.56, 191,791.60 and 78,544.22

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Solution

The fourth proportional to 138,981.56, 191,791.60 and 78,544.22 is: 108,389.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,981.56 : 191,791.60 = 78,544.22 : x
  2. Step 2: Convert to fraction form
    138,981.56/191,791.60 = 78,544.22/x
  3. Step 3: Cross multiply
    138,981.56x = 191,791.60 × 78,544.22
  4. Step 4: Simplify right side
    138,981.56x = 15,064,120,469.23
  5. Step 5: Solve for x
    x = 15,064,120,469.23/138,981.56
  6. Step 6: Final answer
    x = 108,389.35

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1.5x scale

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.