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Finding the Fourth Proportional to 60,401.76, 90,601.92 and 42,558.72

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Solution

The fourth proportional to 60,401.76, 90,601.92 and 42,558.72 is: 63,837.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,401.76 : 90,601.92 = 42,558.72 : x
  2. Step 2: Convert to fraction form
    60,401.76/90,601.92 = 42,558.72/x
  3. Step 3: Cross multiply
    60,401.76x = 90,601.92 × 42,558.72
  4. Step 4: Simplify right side
    60,401.76x = 3,855,901,744.74
  5. Step 5: Solve for x
    x = 3,855,901,744.74/60,401.76
  6. Step 6: Final answer
    x = 63,837.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.