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Finding the Fourth Proportional to 52,663.20, 78,841.20 and 47,133.60

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Solution

The fourth proportional to 52,663.20, 78,841.20 and 47,133.60 is: 70,562.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,663.20 : 78,841.20 = 47,133.60 : x
  2. Step 2: Convert to fraction form
    52,663.20/78,841.20 = 47,133.60/x
  3. Step 3: Cross multiply
    52,663.20x = 78,841.20 × 47,133.60
  4. Step 4: Simplify right side
    52,663.20x = 3,716,069,584.32
  5. Step 5: Solve for x
    x = 3,716,069,584.32/52,663.20
  6. Step 6: Final answer
    x = 70,562.93

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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.