Home / 189,910.49-285,005.66-90,070.97

Finding the Fourth Proportional to 189,910.49, 285,005.66 and 90,070.97

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Solution

The fourth proportional to 189,910.49, 285,005.66 and 90,070.97 is: 135,172.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,910.49 : 285,005.66 = 90,070.97 : x
  2. Step 2: Convert to fraction form
    189,910.49/285,005.66 = 90,070.97/x
  3. Step 3: Cross multiply
    189,910.49x = 285,005.66 × 90,070.97
  4. Step 4: Simplify right side
    189,910.49x = 25,670,734,376.31
  5. Step 5: Solve for x
    x = 25,670,734,376.31/189,910.49
  6. Step 6: Final answer
    x = 135,172.81

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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.