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Finding the Fourth Proportional to 76,586.88, 105,684.48 and 43,057.92

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Solution

The fourth proportional to 76,586.88, 105,684.48 and 43,057.92 is: 59,416.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,586.88 : 105,684.48 = 43,057.92 : x
  2. Step 2: Convert to fraction form
    76,586.88/105,684.48 = 43,057.92/x
  3. Step 3: Cross multiply
    76,586.88x = 105,684.48 × 43,057.92
  4. Step 4: Simplify right side
    76,586.88x = 4,550,553,885.08
  5. Step 5: Solve for x
    x = 4,550,553,885.08/76,586.88
  6. Step 6: Final answer
    x = 59,416.89

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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.