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Finding the Fourth Proportional to 80,661, 111,312.18 and 45,333

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Solution

The fourth proportional to 80,661, 111,312.18 and 45,333 is: 62,559.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,661 : 111,312.18 = 45,333 : x
  2. Step 2: Convert to fraction form
    80,661/111,312.18 = 45,333/x
  3. Step 3: Cross multiply
    80,661x = 111,312.18 × 45,333
  4. Step 4: Simplify right side
    80,661x = 5,046,115,055.94
  5. Step 5: Solve for x
    x = 5,046,115,055.94/80,661
  6. Step 6: Final answer
    x = 62,559.54

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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.