Home / 189,990.36-285,206.40-111,161.16

Finding the Fourth Proportional to 189,990.36, 285,206.40 and 111,161.16

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Solution

The fourth proportional to 189,990.36, 285,206.40 and 111,161.16 is: 166,870.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,990.36 : 285,206.40 = 111,161.16 : x
  2. Step 2: Convert to fraction form
    189,990.36/285,206.40 = 111,161.16/x
  3. Step 3: Cross multiply
    189,990.36x = 285,206.40 × 111,161.16
  4. Step 4: Simplify right side
    189,990.36x = 31,703,874,263.42
  5. Step 5: Solve for x
    x = 31,703,874,263.42/189,990.36
  6. Step 6: Final answer
    x = 166,870.96

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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.