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Finding the Fourth Proportional to 86,169.42, 118,992.24 and 64,911.78

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Solution

The fourth proportional to 86,169.42, 118,992.24 and 64,911.78 is: 89,637.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,169.42 : 118,992.24 = 64,911.78 : x
  2. Step 2: Convert to fraction form
    86,169.42/118,992.24 = 64,911.78/x
  3. Step 3: Cross multiply
    86,169.42x = 118,992.24 × 64,911.78
  4. Step 4: Simplify right side
    86,169.42x = 7,723,998,104.59
  5. Step 5: Solve for x
    x = 7,723,998,104.59/86,169.42
  6. Step 6: Final answer
    x = 89,637.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.