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Finding the Fourth Proportional to 56,916.88, 78,550.70 and 40,554.88

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Solution

The fourth proportional to 56,916.88, 78,550.70 and 40,554.88 is: 55,969.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,916.88 : 78,550.70 = 40,554.88 : x
  2. Step 2: Convert to fraction form
    56,916.88/78,550.70 = 40,554.88/x
  3. Step 3: Cross multiply
    56,916.88x = 78,550.70 × 40,554.88
  4. Step 4: Simplify right side
    56,916.88x = 3,185,614,212.42
  5. Step 5: Solve for x
    x = 3,185,614,212.42/56,916.88
  6. Step 6: Final answer
    x = 55,969.59

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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.