Home / 189,979.06-285,080.48-70,120.39

Finding the Fourth Proportional to 189,979.06, 285,080.48 and 70,120.39

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Solution

The fourth proportional to 189,979.06, 285,080.48 and 70,120.39 is: 105,221.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,979.06 : 285,080.48 = 70,120.39 : x
  2. Step 2: Convert to fraction form
    189,979.06/285,080.48 = 70,120.39/x
  3. Step 3: Cross multiply
    189,979.06x = 285,080.48 × 70,120.39
  4. Step 4: Simplify right side
    189,979.06x = 19,989,952,662.98
  5. Step 5: Solve for x
    x = 19,989,952,662.98/189,979.06
  6. Step 6: Final answer
    x = 105,221.88

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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.