Home / 103,880.56-143,400.36-80,858.20

Finding the Fourth Proportional to 103,880.56, 143,400.36 and 80,858.20

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Solution

The fourth proportional to 103,880.56, 143,400.36 and 80,858.20 is: 111,619.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,880.56 : 143,400.36 = 80,858.20 : x
  2. Step 2: Convert to fraction form
    103,880.56/143,400.36 = 80,858.20/x
  3. Step 3: Cross multiply
    103,880.56x = 143,400.36 × 80,858.20
  4. Step 4: Simplify right side
    103,880.56x = 11,595,094,988.95
  5. Step 5: Solve for x
    x = 11,595,094,988.95/103,880.56
  6. Step 6: Final answer
    x = 111,619.49

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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.