Home / 149,003.45-205,623.65-81,020.47

Finding the Fourth Proportional to 149,003.45, 205,623.65 and 81,020.47

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Solution

The fourth proportional to 149,003.45, 205,623.65 and 81,020.47 is: 111,807.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,003.45 : 205,623.65 = 81,020.47 : x
  2. Step 2: Convert to fraction form
    149,003.45/205,623.65 = 81,020.47/x
  3. Step 3: Cross multiply
    149,003.45x = 205,623.65 × 81,020.47
  4. Step 4: Simplify right side
    149,003.45x = 16,659,723,858.74
  5. Step 5: Solve for x
    x = 16,659,723,858.74/149,003.45
  6. Step 6: Final answer
    x = 111,807.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.