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Finding the Fourth Proportional to 156,991.59, 216,652.50 and 85,375.80

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Solution

The fourth proportional to 156,991.59, 216,652.50 and 85,375.80 is: 117,820.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,991.59 : 216,652.50 = 85,375.80 : x
  2. Step 2: Convert to fraction form
    156,991.59/216,652.50 = 85,375.80/x
  3. Step 3: Cross multiply
    156,991.59x = 216,652.50 × 85,375.80
  4. Step 4: Simplify right side
    156,991.59x = 18,496,880,509.50
  5. Step 5: Solve for x
    x = 18,496,880,509.50/156,991.59
  6. Step 6: Final answer
    x = 117,820.84

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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.