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Finding the Fourth Proportional to 127,299.68, 191,003.52 and 68,120

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Solution

The fourth proportional to 127,299.68, 191,003.52 and 68,120 is: 102,208.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,299.68 : 191,003.52 = 68,120 : x
  2. Step 2: Convert to fraction form
    127,299.68/191,003.52 = 68,120/x
  3. Step 3: Cross multiply
    127,299.68x = 191,003.52 × 68,120
  4. Step 4: Simplify right side
    127,299.68x = 13,011,159,782.40
  5. Step 5: Solve for x
    x = 13,011,159,782.40/127,299.68
  6. Step 6: Final answer
    x = 102,208.90

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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.