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Finding the Fourth Proportional to 303,371.37, 455,053.41 and 78,711.80

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Solution

The fourth proportional to 303,371.37, 455,053.41 and 78,711.80 is: 118,066.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,371.37 : 455,053.41 = 78,711.80 : x
  2. Step 2: Convert to fraction form
    303,371.37/455,053.41 = 78,711.80/x
  3. Step 3: Cross multiply
    303,371.37x = 455,053.41 × 78,711.80
  4. Step 4: Simplify right side
    303,371.37x = 35,818,070,721.97
  5. Step 5: Solve for x
    x = 35,818,070,721.97/303,371.37
  6. Step 6: Final answer
    x = 118,066.75

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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.