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Finding the Fourth Proportional to 129,649.64, 194,474.66 and 85,473.72

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Solution

The fourth proportional to 129,649.64, 194,474.66 and 85,473.72 is: 128,210.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,649.64 : 194,474.66 = 85,473.72 : x
  2. Step 2: Convert to fraction form
    129,649.64/194,474.66 = 85,473.72/x
  3. Step 3: Cross multiply
    129,649.64x = 194,474.66 × 85,473.72
  4. Step 4: Simplify right side
    129,649.64x = 16,622,472,208.57
  5. Step 5: Solve for x
    x = 16,622,472,208.57/129,649.64
  6. Step 6: Final answer
    x = 128,210.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.