Home / 138,749.15-191,453.30-81,366.83

Finding the Fourth Proportional to 138,749.15, 191,453.30 and 81,366.83

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Solution

The fourth proportional to 138,749.15, 191,453.30 and 81,366.83 is: 112,274.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,749.15 : 191,453.30 = 81,366.83 : x
  2. Step 2: Convert to fraction form
    138,749.15/191,453.30 = 81,366.83/x
  3. Step 3: Cross multiply
    138,749.15x = 191,453.30 × 81,366.83
  4. Step 4: Simplify right side
    138,749.15x = 15,577,947,360.19
  5. Step 5: Solve for x
    x = 15,577,947,360.19/138,749.15
  6. Step 6: Final answer
    x = 112,274.18

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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.