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Finding the Fourth Proportional to 103,788.69, 155,683 and 74,264.19

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Solution

The fourth proportional to 103,788.69, 155,683 and 74,264.19 is: 111,396.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,788.69 : 155,683 = 74,264.19 : x
  2. Step 2: Convert to fraction form
    103,788.69/155,683 = 74,264.19/x
  3. Step 3: Cross multiply
    103,788.69x = 155,683 × 74,264.19
  4. Step 4: Simplify right side
    103,788.69x = 11,561,671,891.77
  5. Step 5: Solve for x
    x = 11,561,671,891.77/103,788.69
  6. Step 6: Final answer
    x = 111,396.26

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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.