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Finding the Fourth Proportional to 68,955.78, 103,431.60 and 19,038.92

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Solution

The fourth proportional to 68,955.78, 103,431.60 and 19,038.92 is: 28,557.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,955.78 : 103,431.60 = 19,038.92 : x
  2. Step 2: Convert to fraction form
    68,955.78/103,431.60 = 19,038.92/x
  3. Step 3: Cross multiply
    68,955.78x = 103,431.60 × 19,038.92
  4. Step 4: Simplify right side
    68,955.78x = 1,969,225,957.87
  5. Step 5: Solve for x
    x = 1,969,225,957.87/68,955.78
  6. Step 6: Final answer
    x = 28,557.81

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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.