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Finding the Fourth Proportional to 122,688.80, 183,903.60 and 69,984.80

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Solution

The fourth proportional to 122,688.80, 183,903.60 and 69,984.80 is: 104,903.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,688.80 : 183,903.60 = 69,984.80 : x
  2. Step 2: Convert to fraction form
    122,688.80/183,903.60 = 69,984.80/x
  3. Step 3: Cross multiply
    122,688.80x = 183,903.60 × 69,984.80
  4. Step 4: Simplify right side
    122,688.80x = 12,870,456,665.28
  5. Step 5: Solve for x
    x = 12,870,456,665.28/122,688.80
  6. Step 6: Final answer
    x = 104,903.27

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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.