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Finding the Fourth Proportional to 122,287.40, 183,485.78 and 43,458.20

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Solution

The fourth proportional to 122,287.40, 183,485.78 and 43,458.20 is: 65,206.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,287.40 : 183,485.78 = 43,458.20 : x
  2. Step 2: Convert to fraction form
    122,287.40/183,485.78 = 43,458.20/x
  3. Step 3: Cross multiply
    122,287.40x = 183,485.78 × 43,458.20
  4. Step 4: Simplify right side
    122,287.40x = 7,973,961,507.11
  5. Step 5: Solve for x
    x = 7,973,961,507.11/122,287.40
  6. Step 6: Final answer
    x = 65,206.73

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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.