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Finding the Fourth Proportional to 317,635.59, 476,447.31 and 128,091.96

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Solution

The fourth proportional to 317,635.59, 476,447.31 and 128,091.96 is: 192,135.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,635.59 : 476,447.31 = 128,091.96 : x
  2. Step 2: Convert to fraction form
    317,635.59/476,447.31 = 128,091.96/x
  3. Step 3: Cross multiply
    317,635.59x = 476,447.31 × 128,091.96
  4. Step 4: Simplify right side
    317,635.59x = 61,029,069,774.63
  5. Step 5: Solve for x
    x = 61,029,069,774.63/317,635.59
  6. Step 6: Final answer
    x = 192,135.49

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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.