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Finding the Fourth Proportional to 127,857.60, 191,815.20 and 39,115.20

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Solution

The fourth proportional to 127,857.60, 191,815.20 and 39,115.20 is: 58,681.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,857.60 : 191,815.20 = 39,115.20 : x
  2. Step 2: Convert to fraction form
    127,857.60/191,815.20 = 39,115.20/x
  3. Step 3: Cross multiply
    127,857.60x = 191,815.20 × 39,115.20
  4. Step 4: Simplify right side
    127,857.60x = 7,502,889,911.04
  5. Step 5: Solve for x
    x = 7,502,889,911.04/127,857.60
  6. Step 6: Final answer
    x = 58,681.61

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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.