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Finding the Fourth Proportional to 165,412.80, 248,119.20 and 112,924.80

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Solution

The fourth proportional to 165,412.80, 248,119.20 and 112,924.80 is: 169,387.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,412.80 : 248,119.20 = 112,924.80 : x
  2. Step 2: Convert to fraction form
    165,412.80/248,119.20 = 112,924.80/x
  3. Step 3: Cross multiply
    165,412.80x = 248,119.20 × 112,924.80
  4. Step 4: Simplify right side
    165,412.80x = 28,018,811,036.16
  5. Step 5: Solve for x
    x = 28,018,811,036.16/165,412.80
  6. Step 6: Final answer
    x = 169,387.20

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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.