Home / 121,313.20-181,537.80-76,961.20

Finding the Fourth Proportional to 121,313.20, 181,537.80 and 76,961.20

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Solution

The fourth proportional to 121,313.20, 181,537.80 and 76,961.20 is: 115,167.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,313.20 : 181,537.80 = 76,961.20 : x
  2. Step 2: Convert to fraction form
    121,313.20/181,537.80 = 76,961.20/x
  3. Step 3: Cross multiply
    121,313.20x = 181,537.80 × 76,961.20
  4. Step 4: Simplify right side
    121,313.20x = 13,971,366,933.36
  5. Step 5: Solve for x
    x = 13,971,366,933.36/121,313.20
  6. Step 6: Final answer
    x = 115,167.74

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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.