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Finding the Fourth Proportional to 66,961.62, 92,409.93 and 40,108.50

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Solution

The fourth proportional to 66,961.62, 92,409.93 and 40,108.50 is: 55,351.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,961.62 : 92,409.93 = 40,108.50 : x
  2. Step 2: Convert to fraction form
    66,961.62/92,409.93 = 40,108.50/x
  3. Step 3: Cross multiply
    66,961.62x = 92,409.93 × 40,108.50
  4. Step 4: Simplify right side
    66,961.62x = 3,706,423,677.41
  5. Step 5: Solve for x
    x = 3,706,423,677.41/66,961.62
  6. Step 6: Final answer
    x = 55,351.46

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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.