Home / 69,128.78-103,693.10-19,208.85

Finding the Fourth Proportional to 69,128.78, 103,693.10 and 19,208.85

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Solution

The fourth proportional to 69,128.78, 103,693.10 and 19,208.85 is: 28,813.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,128.78 : 103,693.10 = 19,208.85 : x
  2. Step 2: Convert to fraction form
    69,128.78/103,693.10 = 19,208.85/x
  3. Step 3: Cross multiply
    69,128.78x = 103,693.10 × 19,208.85
  4. Step 4: Simplify right side
    69,128.78x = 1,991,824,685.47
  5. Step 5: Solve for x
    x = 1,991,824,685.47/69,128.78
  6. Step 6: Final answer
    x = 28,813.25

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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.