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Finding the Fourth Proportional to 123,287.20, 184,639.20 and 83,629.60

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Solution

The fourth proportional to 123,287.20, 184,639.20 and 83,629.60 is: 125,246.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,287.20 : 184,639.20 = 83,629.60 : x
  2. Step 2: Convert to fraction form
    123,287.20/184,639.20 = 83,629.60/x
  3. Step 3: Cross multiply
    123,287.20x = 184,639.20 × 83,629.60
  4. Step 4: Simplify right side
    123,287.20x = 15,441,302,440.32
  5. Step 5: Solve for x
    x = 15,441,302,440.32/123,287.20
  6. Step 6: Final answer
    x = 125,246.60

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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.