Home / 138,696.23-191,406.23-81,327.57

Finding the Fourth Proportional to 138,696.23, 191,406.23 and 81,327.57

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Solution

The fourth proportional to 138,696.23, 191,406.23 and 81,327.57 is: 112,235.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,696.23 : 191,406.23 = 81,327.57 : x
  2. Step 2: Convert to fraction form
    138,696.23/191,406.23 = 81,327.57/x
  3. Step 3: Cross multiply
    138,696.23x = 191,406.23 × 81,327.57
  4. Step 4: Simplify right side
    138,696.23x = 15,566,603,162.12
  5. Step 5: Solve for x
    x = 15,566,603,162.12/138,696.23
  6. Step 6: Final answer
    x = 112,235.23

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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.