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Finding the Fourth Proportional to 129,520.80, 194,281.20 and 76,903.20

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Solution

The fourth proportional to 129,520.80, 194,281.20 and 76,903.20 is: 115,354.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,520.80 : 194,281.20 = 76,903.20 : x
  2. Step 2: Convert to fraction form
    129,520.80/194,281.20 = 76,903.20/x
  3. Step 3: Cross multiply
    129,520.80x = 194,281.20 × 76,903.20
  4. Step 4: Simplify right side
    129,520.80x = 14,940,845,979.84
  5. Step 5: Solve for x
    x = 14,940,845,979.84/129,520.80
  6. Step 6: Final answer
    x = 115,354.80

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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.