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Finding the Fourth Proportional to 103,137.76, 154,706.76 and 28,258.54

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Solution

The fourth proportional to 103,137.76, 154,706.76 and 28,258.54 is: 42,387.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,137.76 : 154,706.76 = 28,258.54 : x
  2. Step 2: Convert to fraction form
    103,137.76/154,706.76 = 28,258.54/x
  3. Step 3: Cross multiply
    103,137.76x = 154,706.76 × 28,258.54
  4. Step 4: Simplify right side
    103,137.76x = 4,371,787,165.73
  5. Step 5: Solve for x
    x = 4,371,787,165.73/103,137.76
  6. Step 6: Final answer
    x = 42,387.84

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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.