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Finding the Fourth Proportional to 219,819.59, 303,254.72 and 129,134.64

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Solution

The fourth proportional to 219,819.59, 303,254.72 and 129,134.64 is: 178,149.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,819.59 : 303,254.72 = 129,134.64 : x
  2. Step 2: Convert to fraction form
    219,819.59/303,254.72 = 129,134.64/x
  3. Step 3: Cross multiply
    219,819.59x = 303,254.72 × 129,134.64
  4. Step 4: Simplify right side
    219,819.59x = 39,160,688,449.83
  5. Step 5: Solve for x
    x = 39,160,688,449.83/219,819.59
  6. Step 6: Final answer
    x = 178,149.22

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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.