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Finding the Fourth Proportional to 155,028.94, 213,903.39 and 87,960.94

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Solution

The fourth proportional to 155,028.94, 213,903.39 and 87,960.94 is: 121,365.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,028.94 : 213,903.39 = 87,960.94 : x
  2. Step 2: Convert to fraction form
    155,028.94/213,903.39 = 87,960.94/x
  3. Step 3: Cross multiply
    155,028.94x = 213,903.39 × 87,960.94
  4. Step 4: Simplify right side
    155,028.94x = 18,815,143,253.59
  5. Step 5: Solve for x
    x = 18,815,143,253.59/155,028.94
  6. Step 6: Final answer
    x = 121,365.36

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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.