Home / 103,137.12-142,177.14-80,450.64

Finding the Fourth Proportional to 103,137.12, 142,177.14 and 80,450.64

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Solution

The fourth proportional to 103,137.12, 142,177.14 and 80,450.64 is: 110,903.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,137.12 : 142,177.14 = 80,450.64 : x
  2. Step 2: Convert to fraction form
    103,137.12/142,177.14 = 80,450.64/x
  3. Step 3: Cross multiply
    103,137.12x = 142,177.14 × 80,450.64
  4. Step 4: Simplify right side
    103,137.12x = 11,438,241,906.37
  5. Step 5: Solve for x
    x = 11,438,241,906.37/103,137.12
  6. Step 6: Final answer
    x = 110,903.25

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1.5x scale

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.