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Finding the Fourth Proportional to 122,485.90, 183,635.40 and 55,879.45

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Solution

The fourth proportional to 122,485.90, 183,635.40 and 55,879.45 is: 83,776.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,485.90 : 183,635.40 = 55,879.45 : x
  2. Step 2: Convert to fraction form
    122,485.90/183,635.40 = 55,879.45/x
  3. Step 3: Cross multiply
    122,485.90x = 183,635.40 × 55,879.45
  4. Step 4: Simplify right side
    122,485.90x = 10,261,445,152.53
  5. Step 5: Solve for x
    x = 10,261,445,152.53/122,485.90
  6. Step 6: Final answer
    x = 83,776.54

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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.