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Finding the Fourth Proportional to 45,908.80, 68,731.80 and 28,259.80

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Solution

The fourth proportional to 45,908.80, 68,731.80 and 28,259.80 is: 42,308.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,908.80 : 68,731.80 = 28,259.80 : x
  2. Step 2: Convert to fraction form
    45,908.80/68,731.80 = 28,259.80/x
  3. Step 3: Cross multiply
    45,908.80x = 68,731.80 × 28,259.80
  4. Step 4: Simplify right side
    45,908.80x = 1,942,346,921.64
  5. Step 5: Solve for x
    x = 1,942,346,921.64/45,908.80
  6. Step 6: Final answer
    x = 42,308.81

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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.