Home / 129,190.84-178,172.34-83,824.12

Finding the Fourth Proportional to 129,190.84, 178,172.34 and 83,824.12

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Solution

The fourth proportional to 129,190.84, 178,172.34 and 83,824.12 is: 115,605.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,190.84 : 178,172.34 = 83,824.12 : x
  2. Step 2: Convert to fraction form
    129,190.84/178,172.34 = 83,824.12/x
  3. Step 3: Cross multiply
    129,190.84x = 178,172.34 × 83,824.12
  4. Step 4: Simplify right side
    129,190.84x = 14,935,139,608.84
  5. Step 5: Solve for x
    x = 14,935,139,608.84/129,190.84
  6. Step 6: Final answer
    x = 115,605.25

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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.