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Finding the Fourth Proportional to 122,665.60, 183,771.60 and 69,918.40

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Solution

The fourth proportional to 122,665.60, 183,771.60 and 69,918.40 is: 104,748.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,665.60 : 183,771.60 = 69,918.40 : x
  2. Step 2: Convert to fraction form
    122,665.60/183,771.60 = 69,918.40/x
  3. Step 3: Cross multiply
    122,665.60x = 183,771.60 × 69,918.40
  4. Step 4: Simplify right side
    122,665.60x = 12,849,016,237.44
  5. Step 5: Solve for x
    x = 12,849,016,237.44/122,665.60
  6. Step 6: Final answer
    x = 104,748.33

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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.