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Finding the Fourth Proportional to 105,729.01, 145,866 and 67,489.99

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Solution

The fourth proportional to 105,729.01, 145,866 and 67,489.99 is: 93,110.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,729.01 : 145,866 = 67,489.99 : x
  2. Step 2: Convert to fraction form
    105,729.01/145,866 = 67,489.99/x
  3. Step 3: Cross multiply
    105,729.01x = 145,866 × 67,489.99
  4. Step 4: Simplify right side
    105,729.01x = 9,844,494,881.34
  5. Step 5: Solve for x
    x = 9,844,494,881.34/105,729.01
  6. Step 6: Final answer
    x = 93,110.63

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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.