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Finding the Fourth Proportional to 81,780.40, 122,670.60 and 44,455.60

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Solution

The fourth proportional to 81,780.40, 122,670.60 and 44,455.60 is: 66,683.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,780.40 : 122,670.60 = 44,455.60 : x
  2. Step 2: Convert to fraction form
    81,780.40/122,670.60 = 44,455.60/x
  3. Step 3: Cross multiply
    81,780.40x = 122,670.60 × 44,455.60
  4. Step 4: Simplify right side
    81,780.40x = 5,453,395,125.36
  5. Step 5: Solve for x
    x = 5,453,395,125.36/81,780.40
  6. Step 6: Final answer
    x = 66,683.40

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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.