Home / 138,218.98-190,694.45-83,788.60

Finding the Fourth Proportional to 138,218.98, 190,694.45 and 83,788.60

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Solution

The fourth proportional to 138,218.98, 190,694.45 and 83,788.60 is: 115,599.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,218.98 : 190,694.45 = 83,788.60 : x
  2. Step 2: Convert to fraction form
    138,218.98/190,694.45 = 83,788.60/x
  3. Step 3: Cross multiply
    138,218.98x = 190,694.45 × 83,788.60
  4. Step 4: Simplify right side
    138,218.98x = 15,978,020,039.80
  5. Step 5: Solve for x
    x = 15,978,020,039.80/138,218.98
  6. Step 6: Final answer
    x = 115,599.32

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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.