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Finding the Fourth Proportional to 156,645.60, 216,172.02 and 85,025.61

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Solution

The fourth proportional to 156,645.60, 216,172.02 and 85,025.61 is: 117,335.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,645.60 : 216,172.02 = 85,025.61 : x
  2. Step 2: Convert to fraction form
    156,645.60/216,172.02 = 85,025.61/x
  3. Step 3: Cross multiply
    156,645.60x = 216,172.02 × 85,025.61
  4. Step 4: Simplify right side
    156,645.60x = 18,380,157,865.43
  5. Step 5: Solve for x
    x = 18,380,157,865.43/156,645.60
  6. Step 6: Final answer
    x = 117,335.93

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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.