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Finding the Fourth Proportional to 71,514.60, 98,690.36 and 39,683.56

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Solution

The fourth proportional to 71,514.60, 98,690.36 and 39,683.56 is: 54,763.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,514.60 : 98,690.36 = 39,683.56 : x
  2. Step 2: Convert to fraction form
    71,514.60/98,690.36 = 39,683.56/x
  3. Step 3: Cross multiply
    71,514.60x = 98,690.36 × 39,683.56
  4. Step 4: Simplify right side
    71,514.60x = 3,916,384,822.48
  5. Step 5: Solve for x
    x = 3,916,384,822.48/71,514.60
  6. Step 6: Final answer
    x = 54,763.43

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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.