Home / 138,040.79-190,483.16-80,693.55

Finding the Fourth Proportional to 138,040.79, 190,483.16 and 80,693.55

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Solution

The fourth proportional to 138,040.79, 190,483.16 and 80,693.55 is: 111,349.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,040.79 : 190,483.16 = 80,693.55 : x
  2. Step 2: Convert to fraction form
    138,040.79/190,483.16 = 80,693.55/x
  3. Step 3: Cross multiply
    138,040.79x = 190,483.16 × 80,693.55
  4. Step 4: Simplify right side
    138,040.79x = 15,370,761,992.15
  5. Step 5: Solve for x
    x = 15,370,761,992.15/138,040.79
  6. Step 6: Final answer
    x = 111,349.42

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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.