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Finding the Fourth Proportional to 92,706.56, 138,986.04 and 40,078.88

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Solution

The fourth proportional to 92,706.56, 138,986.04 and 40,078.88 is: 60,086.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,706.56 : 138,986.04 = 40,078.88 : x
  2. Step 2: Convert to fraction form
    92,706.56/138,986.04 = 40,078.88/x
  3. Step 3: Cross multiply
    92,706.56x = 138,986.04 × 40,078.88
  4. Step 4: Simplify right side
    92,706.56x = 5,570,404,818.84
  5. Step 5: Solve for x
    x = 5,570,404,818.84/92,706.56
  6. Step 6: Final answer
    x = 60,086.41

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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.