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Finding the Fourth Proportional to 157,861.61, 217,838.77 and 86,241.61

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Solution

The fourth proportional to 157,861.61, 217,838.77 and 86,241.61 is: 119,007.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,861.61 : 217,838.77 = 86,241.61 : x
  2. Step 2: Convert to fraction form
    157,861.61/217,838.77 = 86,241.61/x
  3. Step 3: Cross multiply
    157,861.61x = 217,838.77 × 86,241.61
  4. Step 4: Simplify right side
    157,861.61x = 18,786,766,301.91
  5. Step 5: Solve for x
    x = 18,786,766,301.91/157,861.61
  6. Step 6: Final answer
    x = 119,007.82

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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.