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Finding the Fourth Proportional to 103,316.72, 154,975.09 and 40,987.22

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Solution

The fourth proportional to 103,316.72, 154,975.09 and 40,987.22 is: 61,480.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,316.72 : 154,975.09 = 40,987.22 : x
  2. Step 2: Convert to fraction form
    103,316.72/154,975.09 = 40,987.22/x
  3. Step 3: Cross multiply
    103,316.72x = 154,975.09 × 40,987.22
  4. Step 4: Simplify right side
    103,316.72x = 6,351,998,108.35
  5. Step 5: Solve for x
    x = 6,351,998,108.35/103,316.72
  6. Step 6: Final answer
    x = 61,480.83

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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.