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Finding the Fourth Proportional to 72,909.90, 109,197.16 and 60,848.60

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Solution

The fourth proportional to 72,909.90, 109,197.16 and 60,848.60 is: 91,132.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,909.90 : 109,197.16 = 60,848.60 : x
  2. Step 2: Convert to fraction form
    72,909.90/109,197.16 = 60,848.60/x
  3. Step 3: Cross multiply
    72,909.90x = 109,197.16 × 60,848.60
  4. Step 4: Simplify right side
    72,909.90x = 6,644,493,611.87
  5. Step 5: Solve for x
    x = 6,644,493,611.87/72,909.90
  6. Step 6: Final answer
    x = 91,132.94

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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.