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Finding the Fourth Proportional to 125,303.72, 187,926.49 and 74,716.87

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Solution

The fourth proportional to 125,303.72, 187,926.49 and 74,716.87 is: 112,057.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,303.72 : 187,926.49 = 74,716.87 : x
  2. Step 2: Convert to fraction form
    125,303.72/187,926.49 = 74,716.87/x
  3. Step 3: Cross multiply
    125,303.72x = 187,926.49 × 74,716.87
  4. Step 4: Simplify right side
    125,303.72x = 14,041,278,678.55
  5. Step 5: Solve for x
    x = 14,041,278,678.55/125,303.72
  6. Step 6: Final answer
    x = 112,057.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.