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Finding the Fourth Proportional to 72,354.60, 108,515.70 and 47,568.60

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Solution

The fourth proportional to 72,354.60, 108,515.70 and 47,568.60 is: 71,342.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,354.60 : 108,515.70 = 47,568.60 : x
  2. Step 2: Convert to fraction form
    72,354.60/108,515.70 = 47,568.60/x
  3. Step 3: Cross multiply
    72,354.60x = 108,515.70 × 47,568.60
  4. Step 4: Simplify right side
    72,354.60x = 5,161,939,927.02
  5. Step 5: Solve for x
    x = 5,161,939,927.02/72,354.60
  6. Step 6: Final answer
    x = 71,342.25

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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.