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Finding the Fourth Proportional to 303,355.95, 455,040.97 and 78,725.25

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Solution

The fourth proportional to 303,355.95, 455,040.97 and 78,725.25 is: 118,089.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,355.95 : 455,040.97 = 78,725.25 : x
  2. Step 2: Convert to fraction form
    303,355.95/455,040.97 = 78,725.25/x
  3. Step 3: Cross multiply
    303,355.95x = 455,040.97 × 78,725.25
  4. Step 4: Simplify right side
    303,355.95x = 35,823,211,848.29
  5. Step 5: Solve for x
    x = 35,823,211,848.29/303,355.95
  6. Step 6: Final answer
    x = 118,089.70

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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.