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Finding the Fourth Proportional to 87,305, 120,475.23 and 51,486.80

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Solution

The fourth proportional to 87,305, 120,475.23 and 51,486.80 is: 71,048.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,305 : 120,475.23 = 51,486.80 : x
  2. Step 2: Convert to fraction form
    87,305/120,475.23 = 51,486.80/x
  3. Step 3: Cross multiply
    87,305x = 120,475.23 × 51,486.80
  4. Step 4: Simplify right side
    87,305x = 6,202,884,071.96
  5. Step 5: Solve for x
    x = 6,202,884,071.96/87,305
  6. Step 6: Final answer
    x = 71,048.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.