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Finding the Fourth Proportional to 71,629.90, 107,370.12 and 39,993.59

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Solution

The fourth proportional to 71,629.90, 107,370.12 and 39,993.59 is: 59,948.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,629.90 : 107,370.12 = 39,993.59 : x
  2. Step 2: Convert to fraction form
    71,629.90/107,370.12 = 39,993.59/x
  3. Step 3: Cross multiply
    71,629.90x = 107,370.12 × 39,993.59
  4. Step 4: Simplify right side
    71,629.90x = 4,294,116,557.53
  5. Step 5: Solve for x
    x = 4,294,116,557.53/71,629.90
  6. Step 6: Final answer
    x = 59,948.66

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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.