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Finding the Fourth Proportional to 318,004.56, 477,023.45 and 81,349.29

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Solution

The fourth proportional to 318,004.56, 477,023.45 and 81,349.29 is: 122,028.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,004.56 : 477,023.45 = 81,349.29 : x
  2. Step 2: Convert to fraction form
    318,004.56/477,023.45 = 81,349.29/x
  3. Step 3: Cross multiply
    318,004.56x = 477,023.45 × 81,349.29
  4. Step 4: Simplify right side
    318,004.56x = 38,805,518,564.10
  5. Step 5: Solve for x
    x = 38,805,518,564.10/318,004.56
  6. Step 6: Final answer
    x = 122,028.18

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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.