Home / 189,909.85-285,004.73-90,070.33

Finding the Fourth Proportional to 189,909.85, 285,004.73 and 90,070.33

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Solution

The fourth proportional to 189,909.85, 285,004.73 and 90,070.33 is: 135,171.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,909.85 : 285,004.73 = 90,070.33 : x
  2. Step 2: Convert to fraction form
    189,909.85/285,004.73 = 90,070.33/x
  3. Step 3: Cross multiply
    189,909.85x = 285,004.73 × 90,070.33
  4. Step 4: Simplify right side
    189,909.85x = 25,670,470,082.66
  5. Step 5: Solve for x
    x = 25,670,470,082.66/189,909.85
  6. Step 6: Final answer
    x = 135,171.87

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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.