Home / 91,109.43-125,789.55-57,164.49

Finding the Fourth Proportional to 91,109.43, 125,789.55 and 57,164.49

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Solution

The fourth proportional to 91,109.43, 125,789.55 and 57,164.49 is: 78,923.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,109.43 : 125,789.55 = 57,164.49 : x
  2. Step 2: Convert to fraction form
    91,109.43/125,789.55 = 57,164.49/x
  3. Step 3: Cross multiply
    91,109.43x = 125,789.55 × 57,164.49
  4. Step 4: Simplify right side
    91,109.43x = 7,190,695,473.08
  5. Step 5: Solve for x
    x = 7,190,695,473.08/91,109.43
  6. Step 6: Final answer
    x = 78,923.72

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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.