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Finding the Fourth Proportional to 136,944.60, 205,416.90 and 83,722.20

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Solution

The fourth proportional to 136,944.60, 205,416.90 and 83,722.20 is: 125,583.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,944.60 : 205,416.90 = 83,722.20 : x
  2. Step 2: Convert to fraction form
    136,944.60/205,416.90 = 83,722.20/x
  3. Step 3: Cross multiply
    136,944.60x = 205,416.90 × 83,722.20
  4. Step 4: Simplify right side
    136,944.60x = 17,197,954,785.18
  5. Step 5: Solve for x
    x = 17,197,954,785.18/136,944.60
  6. Step 6: Final answer
    x = 125,583.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.