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Finding the Fourth Proportional to 123,005.70, 169,771.41 and 72,029.70

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Solution

The fourth proportional to 123,005.70, 169,771.41 and 72,029.70 is: 99,414.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,005.70 : 169,771.41 = 72,029.70 : x
  2. Step 2: Convert to fraction form
    123,005.70/169,771.41 = 72,029.70/x
  3. Step 3: Cross multiply
    123,005.70x = 169,771.41 × 72,029.70
  4. Step 4: Simplify right side
    123,005.70x = 12,228,583,730.88
  5. Step 5: Solve for x
    x = 12,228,583,730.88/123,005.70
  6. Step 6: Final answer
    x = 99,414.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.