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Finding the Fourth Proportional to 127,905.40, 191,874.30 and 68,659.72

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Solution

The fourth proportional to 127,905.40, 191,874.30 and 68,659.72 is: 102,998.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,905.40 : 191,874.30 = 68,659.72 : x
  2. Step 2: Convert to fraction form
    127,905.40/191,874.30 = 68,659.72/x
  3. Step 3: Cross multiply
    127,905.40x = 191,874.30 × 68,659.72
  4. Step 4: Simplify right side
    127,905.40x = 13,174,035,713.20
  5. Step 5: Solve for x
    x = 13,174,035,713.20/127,905.40
  6. Step 6: Final answer
    x = 102,998.28

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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.