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Finding the Fourth Proportional to 156,763.86, 216,334.80 and 85,145.10

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Solution

The fourth proportional to 156,763.86, 216,334.80 and 85,145.10 is: 117,500.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,763.86 : 216,334.80 = 85,145.10 : x
  2. Step 2: Convert to fraction form
    156,763.86/216,334.80 = 85,145.10/x
  3. Step 3: Cross multiply
    156,763.86x = 216,334.80 × 85,145.10
  4. Step 4: Simplify right side
    156,763.86x = 18,419,848,179.48
  5. Step 5: Solve for x
    x = 18,419,848,179.48/156,763.86
  6. Step 6: Final answer
    x = 117,500.60

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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.