Home / 138,126.54-190,617.30-80,770.98

Finding the Fourth Proportional to 138,126.54, 190,617.30 and 80,770.98

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Solution

The fourth proportional to 138,126.54, 190,617.30 and 80,770.98 is: 111,465.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,126.54 : 190,617.30 = 80,770.98 : x
  2. Step 2: Convert to fraction form
    138,126.54/190,617.30 = 80,770.98/x
  3. Step 3: Cross multiply
    138,126.54x = 190,617.30 × 80,770.98
  4. Step 4: Simplify right side
    138,126.54x = 15,396,346,125.95
  5. Step 5: Solve for x
    x = 15,396,346,125.95/138,126.54
  6. Step 6: Final answer
    x = 111,465.52

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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.