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Finding the Fourth Proportional to 71,675.57, 98,918.27 and 39,847.43

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Solution

The fourth proportional to 71,675.57, 98,918.27 and 39,847.43 is: 54,992.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,675.57 : 98,918.27 = 39,847.43 : x
  2. Step 2: Convert to fraction form
    71,675.57/98,918.27 = 39,847.43/x
  3. Step 3: Cross multiply
    71,675.57x = 98,918.27 × 39,847.43
  4. Step 4: Simplify right side
    71,675.57x = 3,941,638,145.72
  5. Step 5: Solve for x
    x = 3,941,638,145.72/71,675.57
  6. Step 6: Final answer
    x = 54,992.77

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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.