Home / 91,155.87-125,761.64-57,165.80

Finding the Fourth Proportional to 91,155.87, 125,761.64 and 57,165.80

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Solution

The fourth proportional to 91,155.87, 125,761.64 and 57,165.80 is: 78,867.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,155.87 : 125,761.64 = 57,165.80 : x
  2. Step 2: Convert to fraction form
    91,155.87/125,761.64 = 57,165.80/x
  3. Step 3: Cross multiply
    91,155.87x = 125,761.64 × 57,165.80
  4. Step 4: Simplify right side
    91,155.87x = 7,189,263,845.27
  5. Step 5: Solve for x
    x = 7,189,263,845.27/91,155.87
  6. Step 6: Final answer
    x = 78,867.81

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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.