Home / 81,300.79-121,938.85-22,141.11

Finding the Fourth Proportional to 81,300.79, 121,938.85 and 22,141.11

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Solution

The fourth proportional to 81,300.79, 121,938.85 and 22,141.11 is: 33,208.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,300.79 : 121,938.85 = 22,141.11 : x
  2. Step 2: Convert to fraction form
    81,300.79/121,938.85 = 22,141.11/x
  3. Step 3: Cross multiply
    81,300.79x = 121,938.85 × 22,141.11
  4. Step 4: Simplify right side
    81,300.79x = 2,699,861,491.12
  5. Step 5: Solve for x
    x = 2,699,861,491.12/81,300.79
  6. Step 6: Final answer
    x = 33,208.31

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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.