Home / 117,785.25-162,480.47-81,912.92

Finding the Fourth Proportional to 117,785.25, 162,480.47 and 81,912.92

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Solution

The fourth proportional to 117,785.25, 162,480.47 and 81,912.92 is: 112,995.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,785.25 : 162,480.47 = 81,912.92 : x
  2. Step 2: Convert to fraction form
    117,785.25/162,480.47 = 81,912.92/x
  3. Step 3: Cross multiply
    117,785.25x = 162,480.47 × 81,912.92
  4. Step 4: Simplify right side
    117,785.25x = 13,309,248,518.71
  5. Step 5: Solve for x
    x = 13,309,248,518.71/117,785.25
  6. Step 6: Final answer
    x = 112,995.88

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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.