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Finding the Fourth Proportional to 156,992.40, 216,645 and 89,015.76

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Solution

The fourth proportional to 156,992.40, 216,645 and 89,015.76 is: 122,839.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,992.40 : 216,645 = 89,015.76 : x
  2. Step 2: Convert to fraction form
    156,992.40/216,645 = 89,015.76/x
  3. Step 3: Cross multiply
    156,992.40x = 216,645 × 89,015.76
  4. Step 4: Simplify right side
    156,992.40x = 19,284,819,325.20
  5. Step 5: Solve for x
    x = 19,284,819,325.20/156,992.40
  6. Step 6: Final answer
    x = 122,839.19

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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.