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Finding the Fourth Proportional to 178,640.51, 267,790.19 and 66,290.67

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Solution

The fourth proportional to 178,640.51, 267,790.19 and 66,290.67 is: 99,372.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,640.51 : 267,790.19 = 66,290.67 : x
  2. Step 2: Convert to fraction form
    178,640.51/267,790.19 = 66,290.67/x
  3. Step 3: Cross multiply
    178,640.51x = 267,790.19 × 66,290.67
  4. Step 4: Simplify right side
    178,640.51x = 17,751,990,783.07
  5. Step 5: Solve for x
    x = 17,751,990,783.07/178,640.51
  6. Step 6: Final answer
    x = 99,372.71

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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.