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Finding the Fourth Proportional to 157,620.92, 217,512.64 and 86,000.92

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Solution

The fourth proportional to 157,620.92, 217,512.64 and 86,000.92 is: 118,678.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,620.92 : 217,512.64 = 86,000.92 : x
  2. Step 2: Convert to fraction form
    157,620.92/217,512.64 = 86,000.92/x
  3. Step 3: Cross multiply
    157,620.92x = 217,512.64 × 86,000.92
  4. Step 4: Simplify right side
    157,620.92x = 18,706,287,151.63
  5. Step 5: Solve for x
    x = 18,706,287,151.63/157,620.92
  6. Step 6: Final answer
    x = 118,678.96

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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.