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Finding the Fourth Proportional to 71,685.22, 98,902.47 and 39,847.99

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Solution

The fourth proportional to 71,685.22, 98,902.47 and 39,847.99 is: 54,977.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,685.22 : 98,902.47 = 39,847.99 : x
  2. Step 2: Convert to fraction form
    71,685.22/98,902.47 = 39,847.99/x
  3. Step 3: Cross multiply
    71,685.22x = 98,902.47 × 39,847.99
  4. Step 4: Simplify right side
    71,685.22x = 3,941,064,635.54
  5. Step 5: Solve for x
    x = 3,941,064,635.54/71,685.22
  6. Step 6: Final answer
    x = 54,977.37

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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.