Home / 138,143.81-190,639.37-77,713.97

Finding the Fourth Proportional to 138,143.81, 190,639.37 and 77,713.97

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Solution

The fourth proportional to 138,143.81, 190,639.37 and 77,713.97 is: 107,245.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,143.81 : 190,639.37 = 77,713.97 : x
  2. Step 2: Convert to fraction form
    138,143.81/190,639.37 = 77,713.97/x
  3. Step 3: Cross multiply
    138,143.81x = 190,639.37 × 77,713.97
  4. Step 4: Simplify right side
    138,143.81x = 14,815,341,522.09
  5. Step 5: Solve for x
    x = 14,815,341,522.09/138,143.81
  6. Step 6: Final answer
    x = 107,245.78

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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.