Home / 138,743.92-191,419.74-90,323.80

Finding the Fourth Proportional to 138,743.92, 191,419.74 and 90,323.80

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Solution

The fourth proportional to 138,743.92, 191,419.74 and 90,323.80 is: 124,616.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,743.92 : 191,419.74 = 90,323.80 : x
  2. Step 2: Convert to fraction form
    138,743.92/191,419.74 = 90,323.80/x
  3. Step 3: Cross multiply
    138,743.92x = 191,419.74 × 90,323.80
  4. Step 4: Simplify right side
    138,743.92x = 17,289,758,311.81
  5. Step 5: Solve for x
    x = 17,289,758,311.81/138,743.92
  6. Step 6: Final answer
    x = 124,616.33

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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.