Home / 129,779.70-194,669.55-128,904.90

Finding the Fourth Proportional to 129,779.70, 194,669.55 and 128,904.90

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Solution

The fourth proportional to 129,779.70, 194,669.55 and 128,904.90 is: 193,357.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,779.70 : 194,669.55 = 128,904.90 : x
  2. Step 2: Convert to fraction form
    129,779.70/194,669.55 = 128,904.90/x
  3. Step 3: Cross multiply
    129,779.70x = 194,669.55 × 128,904.90
  4. Step 4: Simplify right side
    129,779.70x = 25,093,858,875.80
  5. Step 5: Solve for x
    x = 25,093,858,875.80/129,779.70
  6. Step 6: Final answer
    x = 193,357.35

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Similar ratio
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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.