Home / 81,202.34-121,839.12-38,538.59

Finding the Fourth Proportional to 81,202.34, 121,839.12 and 38,538.59

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Solution

The fourth proportional to 81,202.34, 121,839.12 and 38,538.59 is: 57,824.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,202.34 : 121,839.12 = 38,538.59 : x
  2. Step 2: Convert to fraction form
    81,202.34/121,839.12 = 38,538.59/x
  3. Step 3: Cross multiply
    81,202.34x = 121,839.12 × 38,538.59
  4. Step 4: Simplify right side
    81,202.34x = 4,695,507,089.75
  5. Step 5: Solve for x
    x = 4,695,507,089.75/81,202.34
  6. Step 6: Final answer
    x = 57,824.78

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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.