Home / 189,580.60-261,621.34-103,540.78

Finding the Fourth Proportional to 189,580.60, 261,621.34 and 103,540.78

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Solution

The fourth proportional to 189,580.60, 261,621.34 and 103,540.78 is: 142,886.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,580.60 : 261,621.34 = 103,540.78 : x
  2. Step 2: Convert to fraction form
    189,580.60/261,621.34 = 103,540.78/x
  3. Step 3: Cross multiply
    189,580.60x = 261,621.34 × 103,540.78
  4. Step 4: Simplify right side
    189,580.60x = 27,088,478,258.84
  5. Step 5: Solve for x
    x = 27,088,478,258.84/189,580.60
  6. Step 6: Final answer
    x = 142,886.34

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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.