Home / 129,643.40-194,465.10-121,770.20

Finding the Fourth Proportional to 129,643.40, 194,465.10 and 121,770.20

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Solution

The fourth proportional to 129,643.40, 194,465.10 and 121,770.20 is: 182,655.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,643.40 : 194,465.10 = 121,770.20 : x
  2. Step 2: Convert to fraction form
    129,643.40/194,465.10 = 121,770.20/x
  3. Step 3: Cross multiply
    129,643.40x = 194,465.10 × 121,770.20
  4. Step 4: Simplify right side
    129,643.40x = 23,680,054,120.02
  5. Step 5: Solve for x
    x = 23,680,054,120.02/129,643.40
  6. Step 6: Final answer
    x = 182,655.30

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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.