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Finding the Fourth Proportional to 74,485.60, 102,759.60 and 47,620.96

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Solution

The fourth proportional to 74,485.60, 102,759.60 and 47,620.96 is: 65,697.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,485.60 : 102,759.60 = 47,620.96 : x
  2. Step 2: Convert to fraction form
    74,485.60/102,759.60 = 47,620.96/x
  3. Step 3: Cross multiply
    74,485.60x = 102,759.60 × 47,620.96
  4. Step 4: Simplify right side
    74,485.60x = 4,893,510,801.22
  5. Step 5: Solve for x
    x = 4,893,510,801.22/74,485.60
  6. Step 6: Final answer
    x = 65,697.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.