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Finding the Fourth Proportional to 45,821.80, 68,783.90 and 42,813.80

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Solution

The fourth proportional to 45,821.80, 68,783.90 and 42,813.80 is: 64,268.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,821.80 : 68,783.90 = 42,813.80 : x
  2. Step 2: Convert to fraction form
    45,821.80/68,783.90 = 42,813.80/x
  3. Step 3: Cross multiply
    45,821.80x = 68,783.90 × 42,813.80
  4. Step 4: Simplify right side
    45,821.80x = 2,944,900,137.82
  5. Step 5: Solve for x
    x = 2,944,900,137.82/45,821.80
  6. Step 6: Final answer
    x = 64,268.54

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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.