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Finding the Fourth Proportional to 129,519, 178,736.22 and 75,801.42

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Solution

The fourth proportional to 129,519, 178,736.22 and 75,801.42 is: 104,605.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,519 : 178,736.22 = 75,801.42 : x
  2. Step 2: Convert to fraction form
    129,519/178,736.22 = 75,801.42/x
  3. Step 3: Cross multiply
    129,519x = 178,736.22 × 75,801.42
  4. Step 4: Simplify right side
    129,519x = 13,548,459,281.43
  5. Step 5: Solve for x
    x = 13,548,459,281.43/129,519
  6. Step 6: Final answer
    x = 104,605.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.