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Finding the Fourth Proportional to 81,153.80, 111,990.09 and 45,344.10

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Solution

The fourth proportional to 81,153.80, 111,990.09 and 45,344.10 is: 62,573.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,153.80 : 111,990.09 = 45,344.10 : x
  2. Step 2: Convert to fraction form
    81,153.80/111,990.09 = 45,344.10/x
  3. Step 3: Cross multiply
    81,153.80x = 111,990.09 × 45,344.10
  4. Step 4: Simplify right side
    81,153.80x = 5,078,090,429.97
  5. Step 5: Solve for x
    x = 5,078,090,429.97/81,153.80
  6. Step 6: Final answer
    x = 62,573.66

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1.5x scale

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.