Home / 138,794.09-191,528.39-81,425.57

Finding the Fourth Proportional to 138,794.09, 191,528.39 and 81,425.57

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Solution

The fourth proportional to 138,794.09, 191,528.39 and 81,425.57 is: 112,362.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,794.09 : 191,528.39 = 81,425.57 : x
  2. Step 2: Convert to fraction form
    138,794.09/191,528.39 = 81,425.57/x
  3. Step 3: Cross multiply
    138,794.09x = 191,528.39 × 81,425.57
  4. Step 4: Simplify right side
    138,794.09x = 15,595,307,572.85
  5. Step 5: Solve for x
    x = 15,595,307,572.85/138,794.09
  6. Step 6: Final answer
    x = 112,362.91

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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.