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Finding the Fourth Proportional to 53,990.79, 80,986.17 and 28,996.44

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Solution

The fourth proportional to 53,990.79, 80,986.17 and 28,996.44 is: 43,494.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,990.79 : 80,986.17 = 28,996.44 : x
  2. Step 2: Convert to fraction form
    53,990.79/80,986.17 = 28,996.44/x
  3. Step 3: Cross multiply
    53,990.79x = 80,986.17 × 28,996.44
  4. Step 4: Simplify right side
    53,990.79x = 2,348,310,619.23
  5. Step 5: Solve for x
    x = 2,348,310,619.23/53,990.79
  6. Step 6: Final answer
    x = 43,494.65

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.