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Finding the Fourth Proportional to 136,716.40, 205,074.60 and 83,572.30

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Solution

The fourth proportional to 136,716.40, 205,074.60 and 83,572.30 is: 125,358.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,716.40 : 205,074.60 = 83,572.30 : x
  2. Step 2: Convert to fraction form
    136,716.40/205,074.60 = 83,572.30/x
  3. Step 3: Cross multiply
    136,716.40x = 205,074.60 × 83,572.30
  4. Step 4: Simplify right side
    136,716.40x = 17,138,555,993.58
  5. Step 5: Solve for x
    x = 17,138,555,993.58/136,716.40
  6. Step 6: Final answer
    x = 125,358.45

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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.