Home / 81,281.37-121,811.26-39,158.39

Finding the Fourth Proportional to 81,281.37, 121,811.26 and 39,158.39

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Solution

The fourth proportional to 81,281.37, 121,811.26 and 39,158.39 is: 58,684.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,281.37 : 121,811.26 = 39,158.39 : x
  2. Step 2: Convert to fraction form
    81,281.37/121,811.26 = 39,158.39/x
  3. Step 3: Cross multiply
    81,281.37x = 121,811.26 × 39,158.39
  4. Step 4: Simplify right side
    81,281.37x = 4,769,932,118.52
  5. Step 5: Solve for x
    x = 4,769,932,118.52/81,281.37
  6. Step 6: Final answer
    x = 58,684.20

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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.