Home / 69,920.40-104,881.68-19,999.56

Finding the Fourth Proportional to 69,920.40, 104,881.68 and 19,999.56

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Solution

The fourth proportional to 69,920.40, 104,881.68 and 19,999.56 is: 29,999.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,920.40 : 104,881.68 = 19,999.56 : x
  2. Step 2: Convert to fraction form
    69,920.40/104,881.68 = 19,999.56/x
  3. Step 3: Cross multiply
    69,920.40x = 104,881.68 × 19,999.56
  4. Step 4: Simplify right side
    69,920.40x = 2,097,587,452.06
  5. Step 5: Solve for x
    x = 2,097,587,452.06/69,920.40
  6. Step 6: Final answer
    x = 29,999.65

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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.