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Finding the Fourth Proportional to 129,383.98, 194,074.34 and 45,143.98

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Solution

The fourth proportional to 129,383.98, 194,074.34 and 45,143.98 is: 67,715.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,383.98 : 194,074.34 = 45,143.98 : x
  2. Step 2: Convert to fraction form
    129,383.98/194,074.34 = 45,143.98/x
  3. Step 3: Cross multiply
    129,383.98x = 194,074.34 × 45,143.98
  4. Step 4: Simplify right side
    129,383.98x = 8,761,288,123.47
  5. Step 5: Solve for x
    x = 8,761,288,123.47/129,383.98
  6. Step 6: Final answer
    x = 67,715.40

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1.5x scale

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.