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Finding the Fourth Proportional to 303,478.60, 455,217.90 and 126,112.90

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Solution

The fourth proportional to 303,478.60, 455,217.90 and 126,112.90 is: 189,169.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,478.60 : 455,217.90 = 126,112.90 : x
  2. Step 2: Convert to fraction form
    303,478.60/455,217.90 = 126,112.90/x
  3. Step 3: Cross multiply
    303,478.60x = 455,217.90 × 126,112.90
  4. Step 4: Simplify right side
    303,478.60x = 57,408,849,500.91
  5. Step 5: Solve for x
    x = 57,408,849,500.91/303,478.60
  6. Step 6: Final answer
    x = 189,169.35

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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.