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Finding the Fourth Proportional to 68,625.76, 102,928.11 and 18,709.87

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Solution

The fourth proportional to 68,625.76, 102,928.11 and 18,709.87 is: 28,061.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,625.76 : 102,928.11 = 18,709.87 : x
  2. Step 2: Convert to fraction form
    68,625.76/102,928.11 = 18,709.87/x
  3. Step 3: Cross multiply
    68,625.76x = 102,928.11 × 18,709.87
  4. Step 4: Simplify right side
    68,625.76x = 1,925,771,557.45
  5. Step 5: Solve for x
    x = 1,925,771,557.45/68,625.76
  6. Step 6: Final answer
    x = 28,061.93

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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.