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Finding the Fourth Proportional to 129,813.36, 194,721.60 and 45,575.64

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Solution

The fourth proportional to 129,813.36, 194,721.60 and 45,575.64 is: 68,364.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,813.36 : 194,721.60 = 45,575.64 : x
  2. Step 2: Convert to fraction form
    129,813.36/194,721.60 = 45,575.64/x
  3. Step 3: Cross multiply
    129,813.36x = 194,721.60 × 45,575.64
  4. Step 4: Simplify right side
    129,813.36x = 8,874,561,541.82
  5. Step 5: Solve for x
    x = 8,874,561,541.82/129,813.36
  6. Step 6: Final answer
    x = 68,364.01

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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.