Home / 126,127.72-189,064-81,782.65

Finding the Fourth Proportional to 126,127.72, 189,064 and 81,782.65

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Solution

The fourth proportional to 126,127.72, 189,064 and 81,782.65 is: 122,591.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,127.72 : 189,064 = 81,782.65 : x
  2. Step 2: Convert to fraction form
    126,127.72/189,064 = 81,782.65/x
  3. Step 3: Cross multiply
    126,127.72x = 189,064 × 81,782.65
  4. Step 4: Simplify right side
    126,127.72x = 15,462,154,939.60
  5. Step 5: Solve for x
    x = 15,462,154,939.60/126,127.72
  6. Step 6: Final answer
    x = 122,591.25

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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.