Home / 129,120.70-178,186.41-71,758.21

Finding the Fourth Proportional to 129,120.70, 178,186.41 and 71,758.21

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Solution

The fourth proportional to 129,120.70, 178,186.41 and 71,758.21 is: 99,026.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,120.70 : 178,186.41 = 71,758.21 : x
  2. Step 2: Convert to fraction form
    129,120.70/178,186.41 = 71,758.21/x
  3. Step 3: Cross multiply
    129,120.70x = 178,186.41 × 71,758.21
  4. Step 4: Simplify right side
    129,120.70x = 12,786,337,827.93
  5. Step 5: Solve for x
    x = 12,786,337,827.93/129,120.70
  6. Step 6: Final answer
    x = 99,026.24

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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.