Home / 129,460.01-178,629.23-81,778.73

Finding the Fourth Proportional to 129,460.01, 178,629.23 and 81,778.73

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Solution

The fourth proportional to 129,460.01, 178,629.23 and 81,778.73 is: 112,838.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,460.01 : 178,629.23 = 81,778.73 : x
  2. Step 2: Convert to fraction form
    129,460.01/178,629.23 = 81,778.73/x
  3. Step 3: Cross multiply
    129,460.01x = 178,629.23 × 81,778.73
  4. Step 4: Simplify right side
    129,460.01x = 14,608,070,881.58
  5. Step 5: Solve for x
    x = 14,608,070,881.58/129,460.01
  6. Step 6: Final answer
    x = 112,838.49

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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.