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Finding the Fourth Proportional to 318,009.88, 477,012.38 and 81,352.18

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Solution

The fourth proportional to 318,009.88, 477,012.38 and 81,352.18 is: 122,027.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,009.88 : 477,012.38 = 81,352.18 : x
  2. Step 2: Convert to fraction form
    318,009.88/477,012.38 = 81,352.18/x
  3. Step 3: Cross multiply
    318,009.88x = 477,012.38 × 81,352.18
  4. Step 4: Simplify right side
    318,009.88x = 38,805,996,010.84
  5. Step 5: Solve for x
    x = 38,805,996,010.84/318,009.88
  6. Step 6: Final answer
    x = 122,027.64

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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.