Home / 127,998.30-191,997.45-81,303.90

Finding the Fourth Proportional to 127,998.30, 191,997.45 and 81,303.90

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Solution

The fourth proportional to 127,998.30, 191,997.45 and 81,303.90 is: 121,955.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,998.30 : 191,997.45 = 81,303.90 : x
  2. Step 2: Convert to fraction form
    127,998.30/191,997.45 = 81,303.90/x
  3. Step 3: Cross multiply
    127,998.30x = 191,997.45 × 81,303.90
  4. Step 4: Simplify right side
    127,998.30x = 15,610,141,475.06
  5. Step 5: Solve for x
    x = 15,610,141,475.06/127,998.30
  6. Step 6: Final answer
    x = 121,955.85

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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.