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Finding the Fourth Proportional to 79,671.18, 119,506.86 and 20,506.98

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Solution

The fourth proportional to 79,671.18, 119,506.86 and 20,506.98 is: 30,760.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,671.18 : 119,506.86 = 20,506.98 : x
  2. Step 2: Convert to fraction form
    79,671.18/119,506.86 = 20,506.98/x
  3. Step 3: Cross multiply
    79,671.18x = 119,506.86 × 20,506.98
  4. Step 4: Simplify right side
    79,671.18x = 2,450,724,787.88
  5. Step 5: Solve for x
    x = 2,450,724,787.88/79,671.18
  6. Step 6: Final answer
    x = 30,760.49

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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.