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Finding the Fourth Proportional to 129,484.40, 194,226.60 and 76,866.80

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Solution

The fourth proportional to 129,484.40, 194,226.60 and 76,866.80 is: 115,300.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,484.40 : 194,226.60 = 76,866.80 : x
  2. Step 2: Convert to fraction form
    129,484.40/194,226.60 = 76,866.80/x
  3. Step 3: Cross multiply
    129,484.40x = 194,226.60 × 76,866.80
  4. Step 4: Simplify right side
    129,484.40x = 14,929,577,216.88
  5. Step 5: Solve for x
    x = 14,929,577,216.88/129,484.40
  6. Step 6: Final answer
    x = 115,300.20

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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.