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Finding the Fourth Proportional to 68,572.25, 102,790.90 and 40,073.03

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Solution

The fourth proportional to 68,572.25, 102,790.90 and 40,073.03 is: 60,070.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,572.25 : 102,790.90 = 40,073.03 : x
  2. Step 2: Convert to fraction form
    68,572.25/102,790.90 = 40,073.03/x
  3. Step 3: Cross multiply
    68,572.25x = 102,790.90 × 40,073.03
  4. Step 4: Simplify right side
    68,572.25x = 4,119,142,619.06
  5. Step 5: Solve for x
    x = 4,119,142,619.06/68,572.25
  6. Step 6: Final answer
    x = 60,070.11

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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.