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Finding the Fourth Proportional to 129,779.70, 194,669.55 and 54,887.91

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Solution

The fourth proportional to 129,779.70, 194,669.55 and 54,887.91 is: 82,331.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,779.70 : 194,669.55 = 54,887.91 : x
  2. Step 2: Convert to fraction form
    129,779.70/194,669.55 = 54,887.91/x
  3. Step 3: Cross multiply
    129,779.70x = 194,669.55 × 54,887.91
  4. Step 4: Simplify right side
    129,779.70x = 10,685,004,740.14
  5. Step 5: Solve for x
    x = 10,685,004,740.14/129,779.70
  6. Step 6: Final answer
    x = 82,331.87

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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.