Home / 123,205.51-169,991.46-72,190.85

Finding the Fourth Proportional to 123,205.51, 169,991.46 and 72,190.85

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Solution

The fourth proportional to 123,205.51, 169,991.46 and 72,190.85 is: 99,604.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,205.51 : 169,991.46 = 72,190.85 : x
  2. Step 2: Convert to fraction form
    123,205.51/169,991.46 = 72,190.85/x
  3. Step 3: Cross multiply
    123,205.51x = 169,991.46 × 72,190.85
  4. Step 4: Simplify right side
    123,205.51x = 12,271,827,140.18
  5. Step 5: Solve for x
    x = 12,271,827,140.18/123,205.51
  6. Step 6: Final answer
    x = 99,604.54

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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.