Home / 69,971.36-104,980.08-28,407.20

Finding the Fourth Proportional to 69,971.36, 104,980.08 and 28,407.20

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Solution

The fourth proportional to 69,971.36, 104,980.08 and 28,407.20 is: 42,620.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,971.36 : 104,980.08 = 28,407.20 : x
  2. Step 2: Convert to fraction form
    69,971.36/104,980.08 = 28,407.20/x
  3. Step 3: Cross multiply
    69,971.36x = 104,980.08 × 28,407.20
  4. Step 4: Simplify right side
    69,971.36x = 2,982,190,128.58
  5. Step 5: Solve for x
    x = 2,982,190,128.58/69,971.36
  6. Step 6: Final answer
    x = 42,620.15

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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.