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Finding the Fourth Proportional to 74,730.60, 112,268.70 and 51,402.60

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Solution

The fourth proportional to 74,730.60, 112,268.70 and 51,402.60 is: 77,222.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,730.60 : 112,268.70 = 51,402.60 : x
  2. Step 2: Convert to fraction form
    74,730.60/112,268.70 = 51,402.60/x
  3. Step 3: Cross multiply
    74,730.60x = 112,268.70 × 51,402.60
  4. Step 4: Simplify right side
    74,730.60x = 5,770,903,078.62
  5. Step 5: Solve for x
    x = 5,770,903,078.62/74,730.60
  6. Step 6: Final answer
    x = 77,222.76

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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.