Home / 86,619.75-129,929.63-20,955.75

Finding the Fourth Proportional to 86,619.75, 129,929.63 and 20,955.75

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Solution

The fourth proportional to 86,619.75, 129,929.63 and 20,955.75 is: 31,433.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,619.75 : 129,929.63 = 20,955.75 : x
  2. Step 2: Convert to fraction form
    86,619.75/129,929.63 = 20,955.75/x
  3. Step 3: Cross multiply
    86,619.75x = 129,929.63 × 20,955.75
  4. Step 4: Simplify right side
    86,619.75x = 2,722,772,739.09
  5. Step 5: Solve for x
    x = 2,722,772,739.09/86,619.75
  6. Step 6: Final answer
    x = 31,433.63

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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.