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Finding the Fourth Proportional to 156,072.60, 233,712.90 and 85,872.60

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Solution

The fourth proportional to 156,072.60, 233,712.90 and 85,872.60 is: 128,591.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,072.60 : 233,712.90 = 85,872.60 : x
  2. Step 2: Convert to fraction form
    156,072.60/233,712.90 = 85,872.60/x
  3. Step 3: Cross multiply
    156,072.60x = 233,712.90 × 85,872.60
  4. Step 4: Simplify right side
    156,072.60x = 20,069,534,376.54
  5. Step 5: Solve for x
    x = 20,069,534,376.54/156,072.60
  6. Step 6: Final answer
    x = 128,591.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.