Home / 129,109.03-178,174.94-71,750.77

Finding the Fourth Proportional to 129,109.03, 178,174.94 and 71,750.77

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Solution

The fourth proportional to 129,109.03, 178,174.94 and 71,750.77 is: 99,018.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,109.03 : 178,174.94 = 71,750.77 : x
  2. Step 2: Convert to fraction form
    129,109.03/178,174.94 = 71,750.77/x
  3. Step 3: Cross multiply
    129,109.03x = 178,174.94 × 71,750.77
  4. Step 4: Simplify right side
    129,109.03x = 12,784,188,873.64
  5. Step 5: Solve for x
    x = 12,784,188,873.64/129,109.03
  6. Step 6: Final answer
    x = 99,018.55

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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.