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Finding the Fourth Proportional to 103,638.49, 155,457.37 and 28,758.49

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Solution

The fourth proportional to 103,638.49, 155,457.37 and 28,758.49 is: 43,137.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,638.49 : 155,457.37 = 28,758.49 : x
  2. Step 2: Convert to fraction form
    103,638.49/155,457.37 = 28,758.49/x
  3. Step 3: Cross multiply
    103,638.49x = 155,457.37 × 28,758.49
  4. Step 4: Simplify right side
    103,638.49x = 4,470,719,220.57
  5. Step 5: Solve for x
    x = 4,470,719,220.57/103,638.49
  6. Step 6: Final answer
    x = 43,137.63

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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.