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Finding the Fourth Proportional to 58,779.69, 81,115.68 and 31,921.98

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Solution

The fourth proportional to 58,779.69, 81,115.68 and 31,921.98 is: 44,052.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,779.69 : 81,115.68 = 31,921.98 : x
  2. Step 2: Convert to fraction form
    58,779.69/81,115.68 = 31,921.98/x
  3. Step 3: Cross multiply
    58,779.69x = 81,115.68 × 31,921.98
  4. Step 4: Simplify right side
    58,779.69x = 2,589,373,114.65
  5. Step 5: Solve for x
    x = 2,589,373,114.65/58,779.69
  6. Step 6: Final answer
    x = 44,052.17

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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.