Home / 129,593.37-178,817.12-72,220.11

Finding the Fourth Proportional to 129,593.37, 178,817.12 and 72,220.11

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Solution

The fourth proportional to 129,593.37, 178,817.12 and 72,220.11 is: 99,651.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,593.37 : 178,817.12 = 72,220.11 : x
  2. Step 2: Convert to fraction form
    129,593.37/178,817.12 = 72,220.11/x
  3. Step 3: Cross multiply
    129,593.37x = 178,817.12 × 72,220.11
  4. Step 4: Simplify right side
    129,593.37x = 12,914,191,315.44
  5. Step 5: Solve for x
    x = 12,914,191,315.44/129,593.37
  6. Step 6: Final answer
    x = 99,651.64

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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.