Home / 138,355.26-190,930.47-80,984.16

Finding the Fourth Proportional to 138,355.26, 190,930.47 and 80,984.16

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Solution

The fourth proportional to 138,355.26, 190,930.47 and 80,984.16 is: 111,758.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,355.26 : 190,930.47 = 80,984.16 : x
  2. Step 2: Convert to fraction form
    138,355.26/190,930.47 = 80,984.16/x
  3. Step 3: Cross multiply
    138,355.26x = 190,930.47 × 80,984.16
  4. Step 4: Simplify right side
    138,355.26x = 15,462,343,731.36
  5. Step 5: Solve for x
    x = 15,462,343,731.36/138,355.26
  6. Step 6: Final answer
    x = 111,758.26

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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.