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Finding the Fourth Proportional to 81,124.70, 121,691.34 and 25,003.35

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Solution

The fourth proportional to 81,124.70, 121,691.34 and 25,003.35 is: 37,506.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,124.70 : 121,691.34 = 25,003.35 : x
  2. Step 2: Convert to fraction form
    81,124.70/121,691.34 = 25,003.35/x
  3. Step 3: Cross multiply
    81,124.70x = 121,691.34 × 25,003.35
  4. Step 4: Simplify right side
    81,124.70x = 3,042,691,165.99
  5. Step 5: Solve for x
    x = 3,042,691,165.99/81,124.70
  6. Step 6: Final answer
    x = 37,506.35

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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.