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Finding the Fourth Proportional to 71,589.87, 107,384.67 and 39,994.47

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Solution

The fourth proportional to 71,589.87, 107,384.67 and 39,994.47 is: 59,991.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,589.87 : 107,384.67 = 39,994.47 : x
  2. Step 2: Convert to fraction form
    71,589.87/107,384.67 = 39,994.47/x
  3. Step 3: Cross multiply
    71,589.87x = 107,384.67 × 39,994.47
  4. Step 4: Simplify right side
    71,589.87x = 4,294,792,962.77
  5. Step 5: Solve for x
    x = 4,294,792,962.77/71,589.87
  6. Step 6: Final answer
    x = 59,991.63

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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.