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Finding the Fourth Proportional to 115,707.33, 159,630.48 and 72,661.50

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Solution

The fourth proportional to 115,707.33, 159,630.48 and 72,661.50 is: 100,244.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,707.33 : 159,630.48 = 72,661.50 : x
  2. Step 2: Convert to fraction form
    115,707.33/159,630.48 = 72,661.50/x
  3. Step 3: Cross multiply
    115,707.33x = 159,630.48 × 72,661.50
  4. Step 4: Simplify right side
    115,707.33x = 11,598,990,122.52
  5. Step 5: Solve for x
    x = 11,598,990,122.52/115,707.33
  6. Step 6: Final answer
    x = 100,244.21

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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.