Home / 186,720.30-280,189.80-68,403.60

Finding the Fourth Proportional to 186,720.30, 280,189.80 and 68,403.60

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Solution

The fourth proportional to 186,720.30, 280,189.80 and 68,403.60 is: 102,645.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,720.30 : 280,189.80 = 68,403.60 : x
  2. Step 2: Convert to fraction form
    186,720.30/280,189.80 = 68,403.60/x
  3. Step 3: Cross multiply
    186,720.30x = 280,189.80 × 68,403.60
  4. Step 4: Simplify right side
    186,720.30x = 19,165,991,003.28
  5. Step 5: Solve for x
    x = 19,165,991,003.28/186,720.30
  6. Step 6: Final answer
    x = 102,645.46

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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.