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Finding the Fourth Proportional to 158,181.85, 218,290.95 and 86,561.90

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Solution

The fourth proportional to 158,181.85, 218,290.95 and 86,561.90 is: 119,455.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,181.85 : 218,290.95 = 86,561.90 : x
  2. Step 2: Convert to fraction form
    158,181.85/218,290.95 = 86,561.90/x
  3. Step 3: Cross multiply
    158,181.85x = 218,290.95 × 86,561.90
  4. Step 4: Simplify right side
    158,181.85x = 18,895,678,293.35
  5. Step 5: Solve for x
    x = 18,895,678,293.35/158,181.85
  6. Step 6: Final answer
    x = 119,455.42

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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.