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Finding the Fourth Proportional to 140,711.79, 211,089.29 and 56,471.79

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Solution

The fourth proportional to 140,711.79, 211,089.29 and 56,471.79 is: 84,716.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,711.79 : 211,089.29 = 56,471.79 : x
  2. Step 2: Convert to fraction form
    140,711.79/211,089.29 = 56,471.79/x
  3. Step 3: Cross multiply
    140,711.79x = 211,089.29 × 56,471.79
  4. Step 4: Simplify right side
    140,711.79x = 11,920,589,773.77
  5. Step 5: Solve for x
    x = 11,920,589,773.77/140,711.79
  6. Step 6: Final answer
    x = 84,716.35

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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.