Home / 115,539.20-172,905.60-68,825.60

Finding the Fourth Proportional to 115,539.20, 172,905.60 and 68,825.60

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Solution

The fourth proportional to 115,539.20, 172,905.60 and 68,825.60 is: 102,998.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,539.20 : 172,905.60 = 68,825.60 : x
  2. Step 2: Convert to fraction form
    115,539.20/172,905.60 = 68,825.60/x
  3. Step 3: Cross multiply
    115,539.20x = 172,905.60 × 68,825.60
  4. Step 4: Simplify right side
    115,539.20x = 11,900,331,663.36
  5. Step 5: Solve for x
    x = 11,900,331,663.36/115,539.20
  6. Step 6: Final answer
    x = 102,998.22

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1.5x scale

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.