Home / 138,795.09-191,529.77-81,426.57

Finding the Fourth Proportional to 138,795.09, 191,529.77 and 81,426.57

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Solution

The fourth proportional to 138,795.09, 191,529.77 and 81,426.57 is: 112,364.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,795.09 : 191,529.77 = 81,426.57 : x
  2. Step 2: Convert to fraction form
    138,795.09/191,529.77 = 81,426.57/x
  3. Step 3: Cross multiply
    138,795.09x = 191,529.77 × 81,426.57
  4. Step 4: Simplify right side
    138,795.09x = 15,595,612,223.99
  5. Step 5: Solve for x
    x = 15,595,612,223.99/138,795.09
  6. Step 6: Final answer
    x = 112,364.29

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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.