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Finding the Fourth Proportional to 84,059.64, 125,989.20 and 58,621.68

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Solution

The fourth proportional to 84,059.64, 125,989.20 and 58,621.68 is: 87,862.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,059.64 : 125,989.20 = 58,621.68 : x
  2. Step 2: Convert to fraction form
    84,059.64/125,989.20 = 58,621.68/x
  3. Step 3: Cross multiply
    84,059.64x = 125,989.20 × 58,621.68
  4. Step 4: Simplify right side
    84,059.64x = 7,385,698,565.86
  5. Step 5: Solve for x
    x = 7,385,698,565.86/84,059.64
  6. Step 6: Final answer
    x = 87,862.60

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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.