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Finding the Fourth Proportional to 72,049.41, 107,852.66 and 61,420.59

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Solution

The fourth proportional to 72,049.41, 107,852.66 and 61,420.59 is: 91,942.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,049.41 : 107,852.66 = 61,420.59 : x
  2. Step 2: Convert to fraction form
    72,049.41/107,852.66 = 61,420.59/x
  3. Step 3: Cross multiply
    72,049.41x = 107,852.66 × 61,420.59
  4. Step 4: Simplify right side
    72,049.41x = 6,624,373,703.17
  5. Step 5: Solve for x
    x = 6,624,373,703.17/72,049.41
  6. Step 6: Final answer
    x = 91,942.10

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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.