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Finding the Fourth Proportional to 68,495.40, 102,743.10 and 19,247.40

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Solution

The fourth proportional to 68,495.40, 102,743.10 and 19,247.40 is: 28,871.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,495.40 : 102,743.10 = 19,247.40 : x
  2. Step 2: Convert to fraction form
    68,495.40/102,743.10 = 19,247.40/x
  3. Step 3: Cross multiply
    68,495.40x = 102,743.10 × 19,247.40
  4. Step 4: Simplify right side
    68,495.40x = 1,977,537,542.94
  5. Step 5: Solve for x
    x = 1,977,537,542.94/68,495.40
  6. Step 6: Final answer
    x = 28,871.10

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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.