Home / 126,749.49-190,143-42,489.51

Finding the Fourth Proportional to 126,749.49, 190,143 and 42,489.51

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Solution

The fourth proportional to 126,749.49, 190,143 and 42,489.51 is: 63,740.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,749.49 : 190,143 = 42,489.51 : x
  2. Step 2: Convert to fraction form
    126,749.49/190,143 = 42,489.51/x
  3. Step 3: Cross multiply
    126,749.49x = 190,143 × 42,489.51
  4. Step 4: Simplify right side
    126,749.49x = 8,079,082,899.93
  5. Step 5: Solve for x
    x = 8,079,082,899.93/126,749.49
  6. Step 6: Final answer
    x = 63,740.56

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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.