Home / 115,890.75-159,931.67-65,589.75

Finding the Fourth Proportional to 115,890.75, 159,931.67 and 65,589.75

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Solution

The fourth proportional to 115,890.75, 159,931.67 and 65,589.75 is: 90,515.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,890.75 : 159,931.67 = 65,589.75 : x
  2. Step 2: Convert to fraction form
    115,890.75/159,931.67 = 65,589.75/x
  3. Step 3: Cross multiply
    115,890.75x = 159,931.67 × 65,589.75
  4. Step 4: Simplify right side
    115,890.75x = 10,489,877,924.43
  5. Step 5: Solve for x
    x = 10,489,877,924.43/115,890.75
  6. Step 6: Final answer
    x = 90,515.23

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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.