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Finding the Fourth Proportional to 62,792.10, 86,649.15 and 57,776.58

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Solution

The fourth proportional to 62,792.10, 86,649.15 and 57,776.58 is: 79,728.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,792.10 : 86,649.15 = 57,776.58 : x
  2. Step 2: Convert to fraction form
    62,792.10/86,649.15 = 57,776.58/x
  3. Step 3: Cross multiply
    62,792.10x = 86,649.15 × 57,776.58
  4. Step 4: Simplify right side
    62,792.10x = 5,006,291,546.91
  5. Step 5: Solve for x
    x = 5,006,291,546.91/62,792.10
  6. Step 6: Final answer
    x = 79,728.05

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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.