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Finding the Fourth Proportional to 67,378.68, 92,991.15 and 56,028.63

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Solution

The fourth proportional to 67,378.68, 92,991.15 and 56,028.63 is: 77,326.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,378.68 : 92,991.15 = 56,028.63 : x
  2. Step 2: Convert to fraction form
    67,378.68/92,991.15 = 56,028.63/x
  3. Step 3: Cross multiply
    67,378.68x = 92,991.15 × 56,028.63
  4. Step 4: Simplify right side
    67,378.68x = 5,210,166,736.62
  5. Step 5: Solve for x
    x = 5,210,166,736.62/67,378.68
  6. Step 6: Final answer
    x = 77,326.64

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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.