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Finding the Fourth Proportional to 71,783.82, 107,675.73 and 19,191.94

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Solution

The fourth proportional to 71,783.82, 107,675.73 and 19,191.94 is: 28,787.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,783.82 : 107,675.73 = 19,191.94 : x
  2. Step 2: Convert to fraction form
    71,783.82/107,675.73 = 19,191.94/x
  3. Step 3: Cross multiply
    71,783.82x = 107,675.73 × 19,191.94
  4. Step 4: Simplify right side
    71,783.82x = 2,066,505,880.43
  5. Step 5: Solve for x
    x = 2,066,505,880.43/71,783.82
  6. Step 6: Final answer
    x = 28,787.91

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1.5x scale

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.