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Finding the Fourth Proportional to 127,919.13, 191,879.16 and 39,172.28

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Solution

The fourth proportional to 127,919.13, 191,879.16 and 39,172.28 is: 58,758.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,919.13 : 191,879.16 = 39,172.28 : x
  2. Step 2: Convert to fraction form
    127,919.13/191,879.16 = 39,172.28/x
  3. Step 3: Cross multiply
    127,919.13x = 191,879.16 × 39,172.28
  4. Step 4: Simplify right side
    127,919.13x = 7,516,343,222.29
  5. Step 5: Solve for x
    x = 7,516,343,222.29/127,919.13
  6. Step 6: Final answer
    x = 58,758.55

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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.