Home / 138,960.29-191,760.21-78,529.61

Finding the Fourth Proportional to 138,960.29, 191,760.21 and 78,529.61

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Solution

The fourth proportional to 138,960.29, 191,760.21 and 78,529.61 is: 108,368.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,960.29 : 191,760.21 = 78,529.61 : x
  2. Step 2: Convert to fraction form
    138,960.29/191,760.21 = 78,529.61/x
  3. Step 3: Cross multiply
    138,960.29x = 191,760.21 × 78,529.61
  4. Step 4: Simplify right side
    138,960.29x = 15,058,854,984.22
  5. Step 5: Solve for x
    x = 15,058,854,984.22/138,960.29
  6. Step 6: Final answer
    x = 108,368.04

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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.