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Finding the Fourth Proportional to 320,572.72, 480,681.34 and 131,165.97

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Solution

The fourth proportional to 320,572.72, 480,681.34 and 131,165.97 is: 196,676.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,572.72 : 480,681.34 = 131,165.97 : x
  2. Step 2: Convert to fraction form
    320,572.72/480,681.34 = 131,165.97/x
  3. Step 3: Cross multiply
    320,572.72x = 480,681.34 × 131,165.97
  4. Step 4: Simplify right side
    320,572.72x = 63,049,032,091.53
  5. Step 5: Solve for x
    x = 63,049,032,091.53/320,572.72
  6. Step 6: Final answer
    x = 196,676.22

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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.