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Finding the Fourth Proportional to 156,622.80, 234,415.80 and 121,371.60

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Solution

The fourth proportional to 156,622.80, 234,415.80 and 121,371.60 is: 181,655.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,622.80 : 234,415.80 = 121,371.60 : x
  2. Step 2: Convert to fraction form
    156,622.80/234,415.80 = 121,371.60/x
  3. Step 3: Cross multiply
    156,622.80x = 234,415.80 × 121,371.60
  4. Step 4: Simplify right side
    156,622.80x = 28,451,420,711.28
  5. Step 5: Solve for x
    x = 28,451,420,711.28/156,622.80
  6. Step 6: Final answer
    x = 181,655.68

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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.