Home / 81,067.28-111,784.64-52,720.40

Finding the Fourth Proportional to 81,067.28, 111,784.64 and 52,720.40

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Solution

The fourth proportional to 81,067.28, 111,784.64 and 52,720.40 is: 72,696.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,067.28 : 111,784.64 = 52,720.40 : x
  2. Step 2: Convert to fraction form
    81,067.28/111,784.64 = 52,720.40/x
  3. Step 3: Cross multiply
    81,067.28x = 111,784.64 × 52,720.40
  4. Step 4: Simplify right side
    81,067.28x = 5,893,330,934.66
  5. Step 5: Solve for x
    x = 5,893,330,934.66/81,067.28
  6. Step 6: Final answer
    x = 72,696.79

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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.