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Finding the Fourth Proportional to 115,148.50, 158,939.14 and 72,735.28

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Solution

The fourth proportional to 115,148.50, 158,939.14 and 72,735.28 is: 100,396.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,148.50 : 158,939.14 = 72,735.28 : x
  2. Step 2: Convert to fraction form
    115,148.50/158,939.14 = 72,735.28/x
  3. Step 3: Cross multiply
    115,148.50x = 158,939.14 × 72,735.28
  4. Step 4: Simplify right side
    115,148.50x = 11,560,482,850.86
  5. Step 5: Solve for x
    x = 11,560,482,850.86/115,148.50
  6. Step 6: Final answer
    x = 100,396.30

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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.