Home / 112,629.93-169,028.13-90,707.90

Finding the Fourth Proportional to 112,629.93, 169,028.13 and 90,707.90

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Solution

The fourth proportional to 112,629.93, 169,028.13 and 90,707.90 is: 136,128.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,629.93 : 169,028.13 = 90,707.90 : x
  2. Step 2: Convert to fraction form
    112,629.93/169,028.13 = 90,707.90/x
  3. Step 3: Cross multiply
    112,629.93x = 169,028.13 × 90,707.90
  4. Step 4: Simplify right side
    112,629.93x = 15,332,185,868.09
  5. Step 5: Solve for x
    x = 15,332,185,868.09/112,629.93
  6. Step 6: Final answer
    x = 136,128.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.