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Finding the Fourth Proportional to 71,460.88, 98,611.50 and 39,629.80

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Solution

The fourth proportional to 71,460.88, 98,611.50 and 39,629.80 is: 54,686.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,460.88 : 98,611.50 = 39,629.80 : x
  2. Step 2: Convert to fraction form
    71,460.88/98,611.50 = 39,629.80/x
  3. Step 3: Cross multiply
    71,460.88x = 98,611.50 × 39,629.80
  4. Step 4: Simplify right side
    71,460.88x = 3,907,954,022.70
  5. Step 5: Solve for x
    x = 3,907,954,022.70/71,460.88
  6. Step 6: Final answer
    x = 54,686.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.