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Finding the Fourth Proportional to 74,360.57, 111,405.53 and 66,388.95

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Solution

The fourth proportional to 74,360.57, 111,405.53 and 66,388.95 is: 99,462.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,360.57 : 111,405.53 = 66,388.95 : x
  2. Step 2: Convert to fraction form
    74,360.57/111,405.53 = 66,388.95/x
  3. Step 3: Cross multiply
    74,360.57x = 111,405.53 × 66,388.95
  4. Step 4: Simplify right side
    74,360.57x = 7,396,096,160.89
  5. Step 5: Solve for x
    x = 7,396,096,160.89/74,360.57
  6. Step 6: Final answer
    x = 99,462.61

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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.