Home / 138,834.26-191,580.23-78,410.79

Finding the Fourth Proportional to 138,834.26, 191,580.23 and 78,410.79

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Solution

The fourth proportional to 138,834.26, 191,580.23 and 78,410.79 is: 108,200.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,834.26 : 191,580.23 = 78,410.79 : x
  2. Step 2: Convert to fraction form
    138,834.26/191,580.23 = 78,410.79/x
  3. Step 3: Cross multiply
    138,834.26x = 191,580.23 × 78,410.79
  4. Step 4: Simplify right side
    138,834.26x = 15,021,956,790.63
  5. Step 5: Solve for x
    x = 15,021,956,790.63/138,834.26
  6. Step 6: Final answer
    x = 108,200.65

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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.