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Finding the Fourth Proportional to 129,759.40, 194,639.10 and 121,886.20

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Solution

The fourth proportional to 129,759.40, 194,639.10 and 121,886.20 is: 182,829.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,759.40 : 194,639.10 = 121,886.20 : x
  2. Step 2: Convert to fraction form
    129,759.40/194,639.10 = 121,886.20/x
  3. Step 3: Cross multiply
    129,759.40x = 194,639.10 × 121,886.20
  4. Step 4: Simplify right side
    129,759.40x = 23,723,820,270.42
  5. Step 5: Solve for x
    x = 23,723,820,270.42/129,759.40
  6. Step 6: Final answer
    x = 182,829.30

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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.