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Finding the Fourth Proportional to 72,292.87, 99,764.15 and 40,461.77

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Solution

The fourth proportional to 72,292.87, 99,764.15 and 40,461.77 is: 55,837.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,292.87 : 99,764.15 = 40,461.77 : x
  2. Step 2: Convert to fraction form
    72,292.87/99,764.15 = 40,461.77/x
  3. Step 3: Cross multiply
    72,292.87x = 99,764.15 × 40,461.77
  4. Step 4: Simplify right side
    72,292.87x = 4,036,633,740.98
  5. Step 5: Solve for x
    x = 4,036,633,740.98/72,292.87
  6. Step 6: Final answer
    x = 55,837.23

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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.