Home / 149,120.56-205,719.49-100,706.76

Finding the Fourth Proportional to 149,120.56, 205,719.49 and 100,706.76

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Solution

The fourth proportional to 149,120.56, 205,719.49 and 100,706.76 is: 138,930.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,120.56 : 205,719.49 = 100,706.76 : x
  2. Step 2: Convert to fraction form
    149,120.56/205,719.49 = 100,706.76/x
  3. Step 3: Cross multiply
    149,120.56x = 205,719.49 × 100,706.76
  4. Step 4: Simplify right side
    149,120.56x = 20,717,343,306.75
  5. Step 5: Solve for x
    x = 20,717,343,306.75/149,120.56
  6. Step 6: Final answer
    x = 138,930.16

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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.