Home / 78,435.12-117,669.96-25,842.36

Finding the Fourth Proportional to 78,435.12, 117,669.96 and 25,842.36

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Solution

The fourth proportional to 78,435.12, 117,669.96 and 25,842.36 is: 38,769.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,435.12 : 117,669.96 = 25,842.36 : x
  2. Step 2: Convert to fraction form
    78,435.12/117,669.96 = 25,842.36/x
  3. Step 3: Cross multiply
    78,435.12x = 117,669.96 × 25,842.36
  4. Step 4: Simplify right side
    78,435.12x = 3,040,869,467.51
  5. Step 5: Solve for x
    x = 3,040,869,467.51/78,435.12
  6. Step 6: Final answer
    x = 38,769.23

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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.