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Finding the Fourth Proportional to 127,988.80, 191,896.80 and 68,027.20

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Solution

The fourth proportional to 127,988.80, 191,896.80 and 68,027.20 is: 101,994.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,988.80 : 191,896.80 = 68,027.20 : x
  2. Step 2: Convert to fraction form
    127,988.80/191,896.80 = 68,027.20/x
  3. Step 3: Cross multiply
    127,988.80x = 191,896.80 × 68,027.20
  4. Step 4: Simplify right side
    127,988.80x = 13,054,201,992.96
  5. Step 5: Solve for x
    x = 13,054,201,992.96/127,988.80
  6. Step 6: Final answer
    x = 101,994.88

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1.5x scale

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.