Home / 128,784.55-193,128.22-53,909.91

Finding the Fourth Proportional to 128,784.55, 193,128.22 and 53,909.91

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Solution

The fourth proportional to 128,784.55, 193,128.22 and 53,909.91 is: 80,844.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,784.55 : 193,128.22 = 53,909.91 : x
  2. Step 2: Convert to fraction form
    128,784.55/193,128.22 = 53,909.91/x
  3. Step 3: Cross multiply
    128,784.55x = 193,128.22 × 53,909.91
  4. Step 4: Simplify right side
    128,784.55x = 10,411,524,958.66
  5. Step 5: Solve for x
    x = 10,411,524,958.66/128,784.55
  6. Step 6: Final answer
    x = 80,844.52

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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.