Home / 69,619.40-104,429.10-40,128.20

Finding the Fourth Proportional to 69,619.40, 104,429.10 and 40,128.20

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Solution

The fourth proportional to 69,619.40, 104,429.10 and 40,128.20 is: 60,192.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,619.40 : 104,429.10 = 40,128.20 : x
  2. Step 2: Convert to fraction form
    69,619.40/104,429.10 = 40,128.20/x
  3. Step 3: Cross multiply
    69,619.40x = 104,429.10 × 40,128.20
  4. Step 4: Simplify right side
    69,619.40x = 4,190,551,810.62
  5. Step 5: Solve for x
    x = 4,190,551,810.62/69,619.40
  6. Step 6: Final answer
    x = 60,192.30

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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.