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Finding the Fourth Proportional to 92,880, 128,173.27 and 50,438.84

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Solution

The fourth proportional to 92,880, 128,173.27 and 50,438.84 is: 69,604.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,880 : 128,173.27 = 50,438.84 : x
  2. Step 2: Convert to fraction form
    92,880/128,173.27 = 50,438.84/x
  3. Step 3: Cross multiply
    92,880x = 128,173.27 × 50,438.84
  4. Step 4: Simplify right side
    92,880x = 6,464,910,164.75
  5. Step 5: Solve for x
    x = 6,464,910,164.75/92,880
  6. Step 6: Final answer
    x = 69,604.98

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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.