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Finding the Fourth Proportional to 157,000.91, 216,659.21 and 85,379.39

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Solution

The fourth proportional to 157,000.91, 216,659.21 and 85,379.39 is: 117,822.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,000.91 : 216,659.21 = 85,379.39 : x
  2. Step 2: Convert to fraction form
    157,000.91/216,659.21 = 85,379.39/x
  3. Step 3: Cross multiply
    157,000.91x = 216,659.21 × 85,379.39
  4. Step 4: Simplify right side
    157,000.91x = 18,498,231,671.95
  5. Step 5: Solve for x
    x = 18,498,231,671.95/157,000.91
  6. Step 6: Final answer
    x = 117,822.45

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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.