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Finding the Fourth Proportional to 86,622.32, 129,933.48 and 20,958.32

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Solution

The fourth proportional to 86,622.32, 129,933.48 and 20,958.32 is: 31,437.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,622.32 : 129,933.48 = 20,958.32 : x
  2. Step 2: Convert to fraction form
    86,622.32/129,933.48 = 20,958.32/x
  3. Step 3: Cross multiply
    86,622.32x = 129,933.48 × 20,958.32
  4. Step 4: Simplify right side
    86,622.32x = 2,723,186,698.09
  5. Step 5: Solve for x
    x = 2,723,186,698.09/86,622.32
  6. Step 6: Final answer
    x = 31,437.47

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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.