Home / 137,103.09-189,211.91-76,679.36

Finding the Fourth Proportional to 137,103.09, 189,211.91 and 76,679.36

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Solution

The fourth proportional to 137,103.09, 189,211.91 and 76,679.36 is: 105,822.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,103.09 : 189,211.91 = 76,679.36 : x
  2. Step 2: Convert to fraction form
    137,103.09/189,211.91 = 76,679.36/x
  3. Step 3: Cross multiply
    137,103.09x = 189,211.91 × 76,679.36
  4. Step 4: Simplify right side
    137,103.09x = 14,508,648,163.18
  5. Step 5: Solve for x
    x = 14,508,648,163.18/137,103.09
  6. Step 6: Final answer
    x = 105,822.91

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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.