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Finding the Fourth Proportional to 103,668.69, 155,461.17 and 40,479.78

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Solution

The fourth proportional to 103,668.69, 155,461.17 and 40,479.78 is: 60,703.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,668.69 : 155,461.17 = 40,479.78 : x
  2. Step 2: Convert to fraction form
    103,668.69/155,461.17 = 40,479.78/x
  3. Step 3: Cross multiply
    103,668.69x = 155,461.17 × 40,479.78
  4. Step 4: Simplify right side
    103,668.69x = 6,293,033,960.14
  5. Step 5: Solve for x
    x = 6,293,033,960.14/103,668.69
  6. Step 6: Final answer
    x = 60,703.32

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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.