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Finding the Fourth Proportional to 103,636.87, 155,417.03 and 81,493.49

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Solution

The fourth proportional to 103,636.87, 155,417.03 and 81,493.49 is: 122,210.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,636.87 : 155,417.03 = 81,493.49 : x
  2. Step 2: Convert to fraction form
    103,636.87/155,417.03 = 81,493.49/x
  3. Step 3: Cross multiply
    103,636.87x = 155,417.03 × 81,493.49
  4. Step 4: Simplify right side
    103,636.87x = 12,665,476,466.81
  5. Step 5: Solve for x
    x = 12,665,476,466.81/103,636.87
  6. Step 6: Final answer
    x = 122,210.14

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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.