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Finding the Fourth Proportional to 127,860.80, 191,791.20 and 99,867.20

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Solution

The fourth proportional to 127,860.80, 191,791.20 and 99,867.20 is: 149,800.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,860.80 : 191,791.20 = 99,867.20 : x
  2. Step 2: Convert to fraction form
    127,860.80/191,791.20 = 99,867.20/x
  3. Step 3: Cross multiply
    127,860.80x = 191,791.20 × 99,867.20
  4. Step 4: Simplify right side
    127,860.80x = 19,153,650,128.64
  5. Step 5: Solve for x
    x = 19,153,650,128.64/127,860.80
  6. Step 6: Final answer
    x = 149,800.80

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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.