Home / 138,835.26-191,581.60-78,411.79

Finding the Fourth Proportional to 138,835.26, 191,581.60 and 78,411.79

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Solution

The fourth proportional to 138,835.26, 191,581.60 and 78,411.79 is: 108,202.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,835.26 : 191,581.60 = 78,411.79 : x
  2. Step 2: Convert to fraction form
    138,835.26/191,581.60 = 78,411.79/x
  3. Step 3: Cross multiply
    138,835.26x = 191,581.60 × 78,411.79
  4. Step 4: Simplify right side
    138,835.26x = 15,022,256,187.06
  5. Step 5: Solve for x
    x = 15,022,256,187.06/138,835.26
  6. Step 6: Final answer
    x = 108,202.02

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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.