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Finding the Fourth Proportional to 65,739.29, 90,726.59 and 38,890.43

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Solution

The fourth proportional to 65,739.29, 90,726.59 and 38,890.43 is: 53,672.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,739.29 : 90,726.59 = 38,890.43 : x
  2. Step 2: Convert to fraction form
    65,739.29/90,726.59 = 38,890.43/x
  3. Step 3: Cross multiply
    65,739.29x = 90,726.59 × 38,890.43
  4. Step 4: Simplify right side
    65,739.29x = 3,528,395,449.45
  5. Step 5: Solve for x
    x = 3,528,395,449.45/65,739.29
  6. Step 6: Final answer
    x = 53,672.56

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.