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Finding the Fourth Proportional to 156,263.67, 215,644.01 and 84,643.88

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Solution

The fourth proportional to 156,263.67, 215,644.01 and 84,643.88 is: 116,808.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,263.67 : 215,644.01 = 84,643.88 : x
  2. Step 2: Convert to fraction form
    156,263.67/215,644.01 = 84,643.88/x
  3. Step 3: Cross multiply
    156,263.67x = 215,644.01 × 84,643.88
  4. Step 4: Simplify right side
    156,263.67x = 18,252,944,203.72
  5. Step 5: Solve for x
    x = 18,252,944,203.72/156,263.67
  6. Step 6: Final answer
    x = 116,808.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.