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Finding the Fourth Proportional to 81,059.50, 121,589.79 and 25,655.50

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Solution

The fourth proportional to 81,059.50, 121,589.79 and 25,655.50 is: 38,483.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,059.50 : 121,589.79 = 25,655.50 : x
  2. Step 2: Convert to fraction form
    81,059.50/121,589.79 = 25,655.50/x
  3. Step 3: Cross multiply
    81,059.50x = 121,589.79 × 25,655.50
  4. Step 4: Simplify right side
    81,059.50x = 3,119,446,857.35
  5. Step 5: Solve for x
    x = 3,119,446,857.35/81,059.50
  6. Step 6: Final answer
    x = 38,483.42

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1.5x scale

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.