Home / 90,228.86-135,359.84-30,251.28

Finding the Fourth Proportional to 90,228.86, 135,359.84 and 30,251.28

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Solution

The fourth proportional to 90,228.86, 135,359.84 and 30,251.28 is: 45,382.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,228.86 : 135,359.84 = 30,251.28 : x
  2. Step 2: Convert to fraction form
    90,228.86/135,359.84 = 30,251.28/x
  3. Step 3: Cross multiply
    90,228.86x = 135,359.84 × 30,251.28
  4. Step 4: Simplify right side
    90,228.86x = 4,094,808,420.60
  5. Step 5: Solve for x
    x = 4,094,808,420.60/90,228.86
  6. Step 6: Final answer
    x = 45,382.47

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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.