Home / 86,619.50-129,929.26-20,955.50

Finding the Fourth Proportional to 86,619.50, 129,929.26 and 20,955.50

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Solution

The fourth proportional to 86,619.50, 129,929.26 and 20,955.50 is: 31,433.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,619.50 : 129,929.26 = 20,955.50 : x
  2. Step 2: Convert to fraction form
    86,619.50/129,929.26 = 20,955.50/x
  3. Step 3: Cross multiply
    86,619.50x = 129,929.26 × 20,955.50
  4. Step 4: Simplify right side
    86,619.50x = 2,722,732,503.15
  5. Step 5: Solve for x
    x = 2,722,732,503.15/86,619.50
  6. Step 6: Final answer
    x = 31,433.25

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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.