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Finding the Fourth Proportional to 68,742, 103,130.28 and 19,494

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Solution

The fourth proportional to 68,742, 103,130.28 and 19,494 is: 29,245.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,742 : 103,130.28 = 19,494 : x
  2. Step 2: Convert to fraction form
    68,742/103,130.28 = 19,494/x
  3. Step 3: Cross multiply
    68,742x = 103,130.28 × 19,494
  4. Step 4: Simplify right side
    68,742x = 2,010,421,678.32
  5. Step 5: Solve for x
    x = 2,010,421,678.32/68,742
  6. Step 6: Final answer
    x = 29,245.90

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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.