Home / 127,989.20-191,991.29-39,243.57

Finding the Fourth Proportional to 127,989.20, 191,991.29 and 39,243.57

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Solution

The fourth proportional to 127,989.20, 191,991.29 and 39,243.57 is: 58,867.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,989.20 : 191,991.29 = 39,243.57 : x
  2. Step 2: Convert to fraction form
    127,989.20/191,991.29 = 39,243.57/x
  3. Step 3: Cross multiply
    127,989.20x = 191,991.29 × 39,243.57
  4. Step 4: Simplify right side
    127,989.20x = 7,534,423,628.51
  5. Step 5: Solve for x
    x = 7,534,423,628.51/127,989.20
  6. Step 6: Final answer
    x = 58,867.65

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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.