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Finding the Fourth Proportional to 443,381.52, 665,170.68 and 127,813.80

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Solution

The fourth proportional to 443,381.52, 665,170.68 and 127,813.80 is: 191,749.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,381.52 : 665,170.68 = 127,813.80 : x
  2. Step 2: Convert to fraction form
    443,381.52/665,170.68 = 127,813.80/x
  3. Step 3: Cross multiply
    443,381.52x = 665,170.68 × 127,813.80
  4. Step 4: Simplify right side
    443,381.52x = 85,017,992,259.38
  5. Step 5: Solve for x
    x = 85,017,992,259.38/443,381.52
  6. Step 6: Final answer
    x = 191,749.07

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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.