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Finding the Fourth Proportional to 127,889.27, 191,889.18 and 68,655.77

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Solution

The fourth proportional to 127,889.27, 191,889.18 and 68,655.77 is: 103,013.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,889.27 : 191,889.18 = 68,655.77 : x
  2. Step 2: Convert to fraction form
    127,889.27/191,889.18 = 68,655.77/x
  3. Step 3: Cross multiply
    127,889.27x = 191,889.18 × 68,655.77
  4. Step 4: Simplify right side
    127,889.27x = 13,174,299,407.57
  5. Step 5: Solve for x
    x = 13,174,299,407.57/127,889.27
  6. Step 6: Final answer
    x = 103,013.33

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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.