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Finding the Fourth Proportional to 129,770.90, 194,656.35 and 100,246.40

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Solution

The fourth proportional to 129,770.90, 194,656.35 and 100,246.40 is: 150,369.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,770.90 : 194,656.35 = 100,246.40 : x
  2. Step 2: Convert to fraction form
    129,770.90/194,656.35 = 100,246.40/x
  3. Step 3: Cross multiply
    129,770.90x = 194,656.35 × 100,246.40
  4. Step 4: Simplify right side
    129,770.90x = 19,513,598,324.64
  5. Step 5: Solve for x
    x = 19,513,598,324.64/129,770.90
  6. Step 6: Final answer
    x = 150,369.60

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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.