Home / 138,782.13-191,520.92-81,422.46

Finding the Fourth Proportional to 138,782.13, 191,520.92 and 81,422.46

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Solution

The fourth proportional to 138,782.13, 191,520.92 and 81,422.46 is: 112,363.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,782.13 : 191,520.92 = 81,422.46 : x
  2. Step 2: Convert to fraction form
    138,782.13/191,520.92 = 81,422.46/x
  3. Step 3: Cross multiply
    138,782.13x = 191,520.92 × 81,422.46
  4. Step 4: Simplify right side
    138,782.13x = 15,594,104,447.86
  5. Step 5: Solve for x
    x = 15,594,104,447.86/138,782.13
  6. Step 6: Final answer
    x = 112,363.92

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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.