Home / 138,885.13-208,337.51-68,745.61

Finding the Fourth Proportional to 138,885.13, 208,337.51 and 68,745.61

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Solution

The fourth proportional to 138,885.13, 208,337.51 and 68,745.61 is: 103,123.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,885.13 : 208,337.51 = 68,745.61 : x
  2. Step 2: Convert to fraction form
    138,885.13/208,337.51 = 68,745.61/x
  3. Step 3: Cross multiply
    138,885.13x = 208,337.51 × 68,745.61
  4. Step 4: Simplify right side
    138,885.13x = 14,322,289,210.83
  5. Step 5: Solve for x
    x = 14,322,289,210.83/138,885.13
  6. Step 6: Final answer
    x = 103,123.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.