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Finding the Fourth Proportional to 101,880, 140,607.36 and 57,168

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Solution

The fourth proportional to 101,880, 140,607.36 and 57,168 is: 78,899.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,880 : 140,607.36 = 57,168 : x
  2. Step 2: Convert to fraction form
    101,880/140,607.36 = 57,168/x
  3. Step 3: Cross multiply
    101,880x = 140,607.36 × 57,168
  4. Step 4: Simplify right side
    101,880x = 8,038,241,556.48
  5. Step 5: Solve for x
    x = 8,038,241,556.48/101,880
  6. Step 6: Final answer
    x = 78,899.11

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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.