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Finding the Fourth Proportional to 317,763.96, 476,645.52 and 81,106.60

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Solution

The fourth proportional to 317,763.96, 476,645.52 and 81,106.60 is: 121,659.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,763.96 : 476,645.52 = 81,106.60 : x
  2. Step 2: Convert to fraction form
    317,763.96/476,645.52 = 81,106.60/x
  3. Step 3: Cross multiply
    317,763.96x = 476,645.52 × 81,106.60
  4. Step 4: Simplify right side
    317,763.96x = 38,659,097,532.43
  5. Step 5: Solve for x
    x = 38,659,097,532.43/317,763.96
  6. Step 6: Final answer
    x = 121,659.79

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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.