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Finding the Fourth Proportional to 60,709.78, 91,064.68 and 47,405.26

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Solution

The fourth proportional to 60,709.78, 91,064.68 and 47,405.26 is: 71,107.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,709.78 : 91,064.68 = 47,405.26 : x
  2. Step 2: Convert to fraction form
    60,709.78/91,064.68 = 47,405.26/x
  3. Step 3: Cross multiply
    60,709.78x = 91,064.68 × 47,405.26
  4. Step 4: Simplify right side
    60,709.78x = 4,316,944,832.22
  5. Step 5: Solve for x
    x = 4,316,944,832.22/60,709.78
  6. Step 6: Final answer
    x = 71,107.90

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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.