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Finding the Fourth Proportional to 156,628.80, 234,424.80 and 121,377.60

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Solution

The fourth proportional to 156,628.80, 234,424.80 and 121,377.60 is: 181,664.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,628.80 : 234,424.80 = 121,377.60 : x
  2. Step 2: Convert to fraction form
    156,628.80/234,424.80 = 121,377.60/x
  3. Step 3: Cross multiply
    156,628.80x = 234,424.80 × 121,377.60
  4. Step 4: Simplify right side
    156,628.80x = 28,453,919,604.48
  5. Step 5: Solve for x
    x = 28,453,919,604.48/156,628.80
  6. Step 6: Final answer
    x = 181,664.67

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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.