Home / 128,720.28-193,080.60-53,799.42

Finding the Fourth Proportional to 128,720.28, 193,080.60 and 53,799.42

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Solution

The fourth proportional to 128,720.28, 193,080.60 and 53,799.42 is: 80,699.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,720.28 : 193,080.60 = 53,799.42 : x
  2. Step 2: Convert to fraction form
    128,720.28/193,080.60 = 53,799.42/x
  3. Step 3: Cross multiply
    128,720.28x = 193,080.60 × 53,799.42
  4. Step 4: Simplify right side
    128,720.28x = 10,387,624,293.25
  5. Step 5: Solve for x
    x = 10,387,624,293.25/128,720.28
  6. Step 6: Final answer
    x = 80,699.21

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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.