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Finding the Fourth Proportional to 66,872.34, 92,284.86 and 40,015.98

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Solution

The fourth proportional to 66,872.34, 92,284.86 and 40,015.98 is: 55,222.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,872.34 : 92,284.86 = 40,015.98 : x
  2. Step 2: Convert to fraction form
    66,872.34/92,284.86 = 40,015.98/x
  3. Step 3: Cross multiply
    66,872.34x = 92,284.86 × 40,015.98
  4. Step 4: Simplify right side
    66,872.34x = 3,692,869,112.06
  5. Step 5: Solve for x
    x = 3,692,869,112.06/66,872.34
  6. Step 6: Final answer
    x = 55,222.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.