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Finding the Fourth Proportional to 127,536.70, 191,305.05 and 104,986.30

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Solution

The fourth proportional to 127,536.70, 191,305.05 and 104,986.30 is: 157,479.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,536.70 : 191,305.05 = 104,986.30 : x
  2. Step 2: Convert to fraction form
    127,536.70/191,305.05 = 104,986.30/x
  3. Step 3: Cross multiply
    127,536.70x = 191,305.05 × 104,986.30
  4. Step 4: Simplify right side
    127,536.70x = 20,084,409,370.82
  5. Step 5: Solve for x
    x = 20,084,409,370.82/127,536.70
  6. Step 6: Final answer
    x = 157,479.45

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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.