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Finding the Fourth Proportional to 53,159.25, 79,738.88 and 21,995.31

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Solution

The fourth proportional to 53,159.25, 79,738.88 and 21,995.31 is: 32,992.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,159.25 : 79,738.88 = 21,995.31 : x
  2. Step 2: Convert to fraction form
    53,159.25/79,738.88 = 21,995.31/x
  3. Step 3: Cross multiply
    53,159.25x = 79,738.88 × 21,995.31
  4. Step 4: Simplify right side
    53,159.25x = 1,753,881,274.68
  5. Step 5: Solve for x
    x = 1,753,881,274.68/53,159.25
  6. Step 6: Final answer
    x = 32,992.97

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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.