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Finding the Fourth Proportional to 77,909.99, 107,527.30 and 57,738.56

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Solution

The fourth proportional to 77,909.99, 107,527.30 and 57,738.56 is: 79,687.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,909.99 : 107,527.30 = 57,738.56 : x
  2. Step 2: Convert to fraction form
    77,909.99/107,527.30 = 57,738.56/x
  3. Step 3: Cross multiply
    77,909.99x = 107,527.30 × 57,738.56
  4. Step 4: Simplify right side
    77,909.99x = 6,208,470,780.71
  5. Step 5: Solve for x
    x = 6,208,470,780.71/77,909.99
  6. Step 6: Final answer
    x = 79,687.74

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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.