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Finding the Fourth Proportional to 74,433.60, 111,650.40 and 68,443.20

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Solution

The fourth proportional to 74,433.60, 111,650.40 and 68,443.20 is: 102,664.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,433.60 : 111,650.40 = 68,443.20 : x
  2. Step 2: Convert to fraction form
    74,433.60/111,650.40 = 68,443.20/x
  3. Step 3: Cross multiply
    74,433.60x = 111,650.40 × 68,443.20
  4. Step 4: Simplify right side
    74,433.60x = 7,641,710,657.28
  5. Step 5: Solve for x
    x = 7,641,710,657.28/74,433.60
  6. Step 6: Final answer
    x = 102,664.80

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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.