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Finding the Fourth Proportional to 84,617.69, 126,925.54 and 20,576.21

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Solution

The fourth proportional to 84,617.69, 126,925.54 and 20,576.21 is: 30,864.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,617.69 : 126,925.54 = 20,576.21 : x
  2. Step 2: Convert to fraction form
    84,617.69/126,925.54 = 20,576.21/x
  3. Step 3: Cross multiply
    84,617.69x = 126,925.54 × 20,576.21
  4. Step 4: Simplify right side
    84,617.69x = 2,611,645,879.34
  5. Step 5: Solve for x
    x = 2,611,645,879.34/84,617.69
  6. Step 6: Final answer
    x = 30,864.07

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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.