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Finding the Fourth Proportional to 156,857.75, 216,492.86 and 89,789.75

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Solution

The fourth proportional to 156,857.75, 216,492.86 and 89,789.75 is: 123,926.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,857.75 : 216,492.86 = 89,789.75 : x
  2. Step 2: Convert to fraction form
    156,857.75/216,492.86 = 89,789.75/x
  3. Step 3: Cross multiply
    156,857.75x = 216,492.86 × 89,789.75
  4. Step 4: Simplify right side
    156,857.75x = 19,438,839,327.24
  5. Step 5: Solve for x
    x = 19,438,839,327.24/156,857.75
  6. Step 6: Final answer
    x = 123,926.55

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1.5x scale

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.