Home / 142,223.75-196,268.77-78,561.55

Finding the Fourth Proportional to 142,223.75, 196,268.77 and 78,561.55

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Solution

The fourth proportional to 142,223.75, 196,268.77 and 78,561.55 is: 108,414.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,223.75 : 196,268.77 = 78,561.55 : x
  2. Step 2: Convert to fraction form
    142,223.75/196,268.77 = 78,561.55/x
  3. Step 3: Cross multiply
    142,223.75x = 196,268.77 × 78,561.55
  4. Step 4: Simplify right side
    142,223.75x = 15,419,178,027.32
  5. Step 5: Solve for x
    x = 15,419,178,027.32/142,223.75
  6. Step 6: Final answer
    x = 108,414.93

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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.