Home / 209,380.59-289,045.60-128,877.12

Finding the Fourth Proportional to 209,380.59, 289,045.60 and 128,877.12

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Solution

The fourth proportional to 209,380.59, 289,045.60 and 128,877.12 is: 177,912.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,380.59 : 289,045.60 = 128,877.12 : x
  2. Step 2: Convert to fraction form
    209,380.59/289,045.60 = 128,877.12/x
  3. Step 3: Cross multiply
    209,380.59x = 289,045.60 × 128,877.12
  4. Step 4: Simplify right side
    209,380.59x = 37,251,364,154.48
  5. Step 5: Solve for x
    x = 37,251,364,154.48/209,380.59
  6. Step 6: Final answer
    x = 177,912.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.