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Finding the Fourth Proportional to 58,902.90, 81,259.66 and 39,776.56

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Solution

The fourth proportional to 58,902.90, 81,259.66 and 39,776.56 is: 54,873.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,902.90 : 81,259.66 = 39,776.56 : x
  2. Step 2: Convert to fraction form
    58,902.90/81,259.66 = 39,776.56/x
  3. Step 3: Cross multiply
    58,902.90x = 81,259.66 × 39,776.56
  4. Step 4: Simplify right side
    58,902.90x = 3,232,229,741.57
  5. Step 5: Solve for x
    x = 3,232,229,741.57/58,902.90
  6. Step 6: Final answer
    x = 54,873.86

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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.