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Finding the Fourth Proportional to 455,125.52, 682,463.62 and 139,506.32

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Solution

The fourth proportional to 455,125.52, 682,463.62 and 139,506.32 is: 209,190.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,125.52 : 682,463.62 = 139,506.32 : x
  2. Step 2: Convert to fraction form
    455,125.52/682,463.62 = 139,506.32/x
  3. Step 3: Cross multiply
    455,125.52x = 682,463.62 × 139,506.32
  4. Step 4: Simplify right side
    455,125.52x = 95,207,988,160.08
  5. Step 5: Solve for x
    x = 95,207,988,160.08/455,125.52
  6. Step 6: Final answer
    x = 209,190.62

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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.