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Finding the Fourth Proportional to 92,021.80, 138,032.70 and 68,693.80

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Solution

The fourth proportional to 92,021.80, 138,032.70 and 68,693.80 is: 103,040.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,021.80 : 138,032.70 = 68,693.80 : x
  2. Step 2: Convert to fraction form
    92,021.80/138,032.70 = 68,693.80/x
  3. Step 3: Cross multiply
    92,021.80x = 138,032.70 × 68,693.80
  4. Step 4: Simplify right side
    92,021.80x = 9,481,990,687.26
  5. Step 5: Solve for x
    x = 9,481,990,687.26/92,021.80
  6. Step 6: Final answer
    x = 103,040.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.