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Finding the Fourth Proportional to 318,008.22, 477,009.90 and 81,350.52

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Solution

The fourth proportional to 318,008.22, 477,009.90 and 81,350.52 is: 122,025.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,008.22 : 477,009.90 = 81,350.52 : x
  2. Step 2: Convert to fraction form
    318,008.22/477,009.90 = 81,350.52/x
  3. Step 3: Cross multiply
    318,008.22x = 477,009.90 × 81,350.52
  4. Step 4: Simplify right side
    318,008.22x = 38,805,003,410.15
  5. Step 5: Solve for x
    x = 38,805,003,410.15/318,008.22
  6. Step 6: Final answer
    x = 122,025.16

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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.