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Finding the Fourth Proportional to 303,355.45, 455,040.22 and 78,724.75

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Solution

The fourth proportional to 303,355.45, 455,040.22 and 78,724.75 is: 118,088.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,355.45 : 455,040.22 = 78,724.75 : x
  2. Step 2: Convert to fraction form
    303,355.45/455,040.22 = 78,724.75/x
  3. Step 3: Cross multiply
    303,355.45x = 455,040.22 × 78,724.75
  4. Step 4: Simplify right side
    303,355.45x = 35,822,925,284.24
  5. Step 5: Solve for x
    x = 35,822,925,284.24/303,355.45
  6. Step 6: Final answer
    x = 118,088.95

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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.