Home / 80,914.07-121,434.66-56,128.55

Finding the Fourth Proportional to 80,914.07, 121,434.66 and 56,128.55

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Solution

The fourth proportional to 80,914.07, 121,434.66 and 56,128.55 is: 84,236.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,914.07 : 121,434.66 = 56,128.55 : x
  2. Step 2: Convert to fraction form
    80,914.07/121,434.66 = 56,128.55/x
  3. Step 3: Cross multiply
    80,914.07x = 121,434.66 × 56,128.55
  4. Step 4: Simplify right side
    80,914.07x = 6,815,950,778.37
  5. Step 5: Solve for x
    x = 6,815,950,778.37/80,914.07
  6. Step 6: Final answer
    x = 84,236.90

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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.