Home / 129,189.84-178,170.96-83,823.12

Finding the Fourth Proportional to 129,189.84, 178,170.96 and 83,823.12

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Solution

The fourth proportional to 129,189.84, 178,170.96 and 83,823.12 is: 115,603.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,189.84 : 178,170.96 = 83,823.12 : x
  2. Step 2: Convert to fraction form
    129,189.84/178,170.96 = 83,823.12/x
  3. Step 3: Cross multiply
    129,189.84x = 178,170.96 × 83,823.12
  4. Step 4: Simplify right side
    129,189.84x = 14,934,845,760.60
  5. Step 5: Solve for x
    x = 14,934,845,760.60/129,189.84
  6. Step 6: Final answer
    x = 115,603.87

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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.