Home / 127,988.20-192,068.70-71,828.20

Finding the Fourth Proportional to 127,988.20, 192,068.70 and 71,828.20

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Solution

The fourth proportional to 127,988.20, 192,068.70 and 71,828.20 is: 107,790.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,988.20 : 192,068.70 = 71,828.20 : x
  2. Step 2: Convert to fraction form
    127,988.20/192,068.70 = 71,828.20/x
  3. Step 3: Cross multiply
    127,988.20x = 192,068.70 × 71,828.20
  4. Step 4: Simplify right side
    127,988.20x = 13,795,948,997.34
  5. Step 5: Solve for x
    x = 13,795,948,997.34/127,988.20
  6. Step 6: Final answer
    x = 107,790.79

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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.