Home / 137,861.76-190,200.78-90,143.04

Finding the Fourth Proportional to 137,861.76, 190,200.78 and 90,143.04

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Solution

The fourth proportional to 137,861.76, 190,200.78 and 90,143.04 is: 124,365.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,861.76 : 190,200.78 = 90,143.04 : x
  2. Step 2: Convert to fraction form
    137,861.76/190,200.78 = 90,143.04/x
  3. Step 3: Cross multiply
    137,861.76x = 190,200.78 × 90,143.04
  4. Step 4: Simplify right side
    137,861.76x = 17,145,276,519.57
  5. Step 5: Solve for x
    x = 17,145,276,519.57/137,861.76
  6. Step 6: Final answer
    x = 124,365.72

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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.