Home / 129,049.75-178,011.43-81,220.06

Finding the Fourth Proportional to 129,049.75, 178,011.43 and 81,220.06

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Solution

The fourth proportional to 129,049.75, 178,011.43 and 81,220.06 is: 112,035.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,049.75 : 178,011.43 = 81,220.06 : x
  2. Step 2: Convert to fraction form
    129,049.75/178,011.43 = 81,220.06/x
  3. Step 3: Cross multiply
    129,049.75x = 178,011.43 × 81,220.06
  4. Step 4: Simplify right side
    129,049.75x = 14,458,099,025.29
  5. Step 5: Solve for x
    x = 14,458,099,025.29/129,049.75
  6. Step 6: Final answer
    x = 112,035.08

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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.