Home / 127,812.20-191,718.30-105,261.80

Finding the Fourth Proportional to 127,812.20, 191,718.30 and 105,261.80

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Solution

The fourth proportional to 127,812.20, 191,718.30 and 105,261.80 is: 157,892.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,812.20 : 191,718.30 = 105,261.80 : x
  2. Step 2: Convert to fraction form
    127,812.20/191,718.30 = 105,261.80/x
  3. Step 3: Cross multiply
    127,812.20x = 191,718.30 × 105,261.80
  4. Step 4: Simplify right side
    127,812.20x = 20,180,613,350.94
  5. Step 5: Solve for x
    x = 20,180,613,350.94/127,812.20
  6. Step 6: Final answer
    x = 157,892.70

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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.