Home / 129,257.01-178,391.30-72,679.32

Finding the Fourth Proportional to 129,257.01, 178,391.30 and 72,679.32

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Solution

The fourth proportional to 129,257.01, 178,391.30 and 72,679.32 is: 100,306.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,257.01 : 178,391.30 = 72,679.32 : x
  2. Step 2: Convert to fraction form
    129,257.01/178,391.30 = 72,679.32/x
  3. Step 3: Cross multiply
    129,257.01x = 178,391.30 × 72,679.32
  4. Step 4: Simplify right side
    129,257.01x = 12,965,358,014.52
  5. Step 5: Solve for x
    x = 12,965,358,014.52/129,257.01
  6. Step 6: Final answer
    x = 100,306.81

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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.