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Finding the Fourth Proportional to 68,280, 102,420.06 and 19,032

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Solution

The fourth proportional to 68,280, 102,420.06 and 19,032 is: 28,548.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,280 : 102,420.06 = 19,032 : x
  2. Step 2: Convert to fraction form
    68,280/102,420.06 = 19,032/x
  3. Step 3: Cross multiply
    68,280x = 102,420.06 × 19,032
  4. Step 4: Simplify right side
    68,280x = 1,949,258,581.92
  5. Step 5: Solve for x
    x = 1,949,258,581.92/68,280
  6. Step 6: Final answer
    x = 28,548.02

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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.