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Finding the Fourth Proportional to 326,006.17, 488,967.72 and 126,189.85

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Solution

The fourth proportional to 326,006.17, 488,967.72 and 126,189.85 is: 189,268.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,006.17 : 488,967.72 = 126,189.85 : x
  2. Step 2: Convert to fraction form
    326,006.17/488,967.72 = 126,189.85/x
  3. Step 3: Cross multiply
    326,006.17x = 488,967.72 × 126,189.85
  4. Step 4: Simplify right side
    326,006.17x = 61,702,763,241.64
  5. Step 5: Solve for x
    x = 61,702,763,241.64/326,006.17
  6. Step 6: Final answer
    x = 189,268.70

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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.