Home / 189,139.92-261,009.54-103,099.72

Finding the Fourth Proportional to 189,139.92, 261,009.54 and 103,099.72

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Solution

The fourth proportional to 189,139.92, 261,009.54 and 103,099.72 is: 142,275.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,139.92 : 261,009.54 = 103,099.72 : x
  2. Step 2: Convert to fraction form
    189,139.92/261,009.54 = 103,099.72/x
  3. Step 3: Cross multiply
    189,139.92x = 261,009.54 × 103,099.72
  4. Step 4: Simplify right side
    189,139.92x = 26,910,010,491.33
  5. Step 5: Solve for x
    x = 26,910,010,491.33/189,139.92
  6. Step 6: Final answer
    x = 142,275.68

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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.