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Finding the Fourth Proportional to 68,913.32, 103,373.51 and 18,992.32

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Solution

The fourth proportional to 68,913.32, 103,373.51 and 18,992.32 is: 28,489.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,913.32 : 103,373.51 = 18,992.32 : x
  2. Step 2: Convert to fraction form
    68,913.32/103,373.51 = 18,992.32/x
  3. Step 3: Cross multiply
    68,913.32x = 103,373.51 × 18,992.32
  4. Step 4: Simplify right side
    68,913.32x = 1,963,302,428.05
  5. Step 5: Solve for x
    x = 1,963,302,428.05/68,913.32
  6. Step 6: Final answer
    x = 28,489.45

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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.