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Finding the Fourth Proportional to 156,965.84, 216,606.88 and 85,345.91

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Solution

The fourth proportional to 156,965.84, 216,606.88 and 85,345.91 is: 117,774.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,965.84 : 216,606.88 = 85,345.91 : x
  2. Step 2: Convert to fraction form
    156,965.84/216,606.88 = 85,345.91/x
  3. Step 3: Cross multiply
    156,965.84x = 216,606.88 × 85,345.91
  4. Step 4: Simplify right side
    156,965.84x = 18,486,511,614.01
  5. Step 5: Solve for x
    x = 18,486,511,614.01/156,965.84
  6. Step 6: Final answer
    x = 117,774.11

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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.