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Finding the Fourth Proportional to 71,438.99, 107,150.27 and 18,852.57

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Solution

The fourth proportional to 71,438.99, 107,150.27 and 18,852.57 is: 28,276.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,438.99 : 107,150.27 = 18,852.57 : x
  2. Step 2: Convert to fraction form
    71,438.99/107,150.27 = 18,852.57/x
  3. Step 3: Cross multiply
    71,438.99x = 107,150.27 × 18,852.57
  4. Step 4: Simplify right side
    71,438.99x = 2,020,057,871.43
  5. Step 5: Solve for x
    x = 2,020,057,871.43/71,438.99
  6. Step 6: Final answer
    x = 28,276.69

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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.