Home / 81,302.12-121,460.53-51,481.16

Finding the Fourth Proportional to 81,302.12, 121,460.53 and 51,481.16

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Solution

The fourth proportional to 81,302.12, 121,460.53 and 51,481.16 is: 76,909.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,302.12 : 121,460.53 = 51,481.16 : x
  2. Step 2: Convert to fraction form
    81,302.12/121,460.53 = 51,481.16/x
  3. Step 3: Cross multiply
    81,302.12x = 121,460.53 × 51,481.16
  4. Step 4: Simplify right side
    81,302.12x = 6,252,928,978.61
  5. Step 5: Solve for x
    x = 6,252,928,978.61/81,302.12
  6. Step 6: Final answer
    x = 76,909.79

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.