Home / 138,257.40-190,793.09-77,827.85

Finding the Fourth Proportional to 138,257.40, 190,793.09 and 77,827.85

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Solution

The fourth proportional to 138,257.40, 190,793.09 and 77,827.85 is: 107,401.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,257.40 : 190,793.09 = 77,827.85 : x
  2. Step 2: Convert to fraction form
    138,257.40/190,793.09 = 77,827.85/x
  3. Step 3: Cross multiply
    138,257.40x = 190,793.09 × 77,827.85
  4. Step 4: Simplify right side
    138,257.40x = 14,849,016,581.06
  5. Step 5: Solve for x
    x = 14,849,016,581.06/138,257.40
  6. Step 6: Final answer
    x = 107,401.24

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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.