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Finding the Fourth Proportional to 91,998.88, 137,723.28 and 56,347.96

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Solution

The fourth proportional to 91,998.88, 137,723.28 and 56,347.96 is: 84,353.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,998.88 : 137,723.28 = 56,347.96 : x
  2. Step 2: Convert to fraction form
    91,998.88/137,723.28 = 56,347.96/x
  3. Step 3: Cross multiply
    91,998.88x = 137,723.28 × 56,347.96
  4. Step 4: Simplify right side
    91,998.88x = 7,760,425,872.51
  5. Step 5: Solve for x
    x = 7,760,425,872.51/91,998.88
  6. Step 6: Final answer
    x = 84,353.48

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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.