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Finding the Fourth Proportional to 127,853.60, 191,809.20 and 39,111.20

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Solution

The fourth proportional to 127,853.60, 191,809.20 and 39,111.20 is: 58,675.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,853.60 : 191,809.20 = 39,111.20 : x
  2. Step 2: Convert to fraction form
    127,853.60/191,809.20 = 39,111.20/x
  3. Step 3: Cross multiply
    127,853.60x = 191,809.20 × 39,111.20
  4. Step 4: Simplify right side
    127,853.60x = 7,501,887,983.04
  5. Step 5: Solve for x
    x = 7,501,887,983.04/127,853.60
  6. Step 6: Final answer
    x = 58,675.61

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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.