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Finding the Fourth Proportional to 303,517.80, 455,276.70 and 78,859.80

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Solution

The fourth proportional to 303,517.80, 455,276.70 and 78,859.80 is: 118,289.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,517.80 : 455,276.70 = 78,859.80 : x
  2. Step 2: Convert to fraction form
    303,517.80/455,276.70 = 78,859.80/x
  3. Step 3: Cross multiply
    303,517.80x = 455,276.70 × 78,859.80
  4. Step 4: Simplify right side
    303,517.80x = 35,903,029,506.66
  5. Step 5: Solve for x
    x = 35,903,029,506.66/303,517.80
  6. Step 6: Final answer
    x = 118,289.70

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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.