Home / 138,164.32-190,673.76-81,574.48

Finding the Fourth Proportional to 138,164.32, 190,673.76 and 81,574.48

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Solution

The fourth proportional to 138,164.32, 190,673.76 and 81,574.48 is: 112,576.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,164.32 : 190,673.76 = 81,574.48 : x
  2. Step 2: Convert to fraction form
    138,164.32/190,673.76 = 81,574.48/x
  3. Step 3: Cross multiply
    138,164.32x = 190,673.76 × 81,574.48
  4. Step 4: Simplify right side
    138,164.32x = 15,554,112,821.64
  5. Step 5: Solve for x
    x = 15,554,112,821.64/138,164.32
  6. Step 6: Final answer
    x = 112,576.91

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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.