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Finding the Fourth Proportional to 71,381.25, 107,077.95 and 18,790.89

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Solution

The fourth proportional to 71,381.25, 107,077.95 and 18,790.89 is: 28,187.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,381.25 : 107,077.95 = 18,790.89 : x
  2. Step 2: Convert to fraction form
    71,381.25/107,077.95 = 18,790.89/x
  3. Step 3: Cross multiply
    71,381.25x = 107,077.95 × 18,790.89
  4. Step 4: Simplify right side
    71,381.25x = 2,012,089,578.33
  5. Step 5: Solve for x
    x = 2,012,089,578.33/71,381.25
  6. Step 6: Final answer
    x = 28,187.93

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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.