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Finding the Fourth Proportional to 115,403.40, 173,121.30 and 36,509.40

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Solution

The fourth proportional to 115,403.40, 173,121.30 and 36,509.40 is: 54,769.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,403.40 : 173,121.30 = 36,509.40 : x
  2. Step 2: Convert to fraction form
    115,403.40/173,121.30 = 36,509.40/x
  3. Step 3: Cross multiply
    115,403.40x = 173,121.30 × 36,509.40
  4. Step 4: Simplify right side
    115,403.40x = 6,320,554,790.22
  5. Step 5: Solve for x
    x = 6,320,554,790.22/115,403.40
  6. Step 6: Final answer
    x = 54,769.23

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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.