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Finding the Fourth Proportional to 129,668.46, 194,502.72 and 40,928.88

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Solution

The fourth proportional to 129,668.46, 194,502.72 and 40,928.88 is: 61,393.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,668.46 : 194,502.72 = 40,928.88 : x
  2. Step 2: Convert to fraction form
    129,668.46/194,502.72 = 40,928.88/x
  3. Step 3: Cross multiply
    129,668.46x = 194,502.72 × 40,928.88
  4. Step 4: Simplify right side
    129,668.46x = 7,960,778,486.55
  5. Step 5: Solve for x
    x = 7,960,778,486.55/129,668.46
  6. Step 6: Final answer
    x = 61,393.33

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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.