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Finding the Fourth Proportional to 305,850.80, 458,776.20 and 81,210.80

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Solution

The fourth proportional to 305,850.80, 458,776.20 and 81,210.80 is: 121,816.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,850.80 : 458,776.20 = 81,210.80 : x
  2. Step 2: Convert to fraction form
    305,850.80/458,776.20 = 81,210.80/x
  3. Step 3: Cross multiply
    305,850.80x = 458,776.20 × 81,210.80
  4. Step 4: Simplify right side
    305,850.80x = 37,257,582,222.96
  5. Step 5: Solve for x
    x = 37,257,582,222.96/305,850.80
  6. Step 6: Final answer
    x = 121,816.20

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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.