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Finding the Fourth Proportional to 71,009.68, 97,991.76 and 39,181.60

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Solution

The fourth proportional to 71,009.68, 97,991.76 and 39,181.60 is: 54,069.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,009.68 : 97,991.76 = 39,181.60 : x
  2. Step 2: Convert to fraction form
    71,009.68/97,991.76 = 39,181.60/x
  3. Step 3: Cross multiply
    71,009.68x = 97,991.76 × 39,181.60
  4. Step 4: Simplify right side
    71,009.68x = 3,839,473,943.62
  5. Step 5: Solve for x
    x = 3,839,473,943.62/71,009.68
  6. Step 6: Final answer
    x = 54,069.73

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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.