Home / 138,383.12-190,769.64-98,570

Finding the Fourth Proportional to 138,383.12, 190,769.64 and 98,570

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Solution

The fourth proportional to 138,383.12, 190,769.64 and 98,570 is: 135,884.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,383.12 : 190,769.64 = 98,570 : x
  2. Step 2: Convert to fraction form
    138,383.12/190,769.64 = 98,570/x
  3. Step 3: Cross multiply
    138,383.12x = 190,769.64 × 98,570
  4. Step 4: Simplify right side
    138,383.12x = 18,804,163,414.80
  5. Step 5: Solve for x
    x = 18,804,163,414.80/138,383.12
  6. Step 6: Final answer
    x = 135,884.81

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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.