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Finding the Fourth Proportional to 129,795.31, 194,779.84 and 45,555.87

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Solution

The fourth proportional to 129,795.31, 194,779.84 and 45,555.87 is: 68,364.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,795.31 : 194,779.84 = 45,555.87 : x
  2. Step 2: Convert to fraction form
    129,795.31/194,779.84 = 45,555.87/x
  3. Step 3: Cross multiply
    129,795.31x = 194,779.84 × 45,555.87
  4. Step 4: Simplify right side
    129,795.31x = 8,873,364,675.98
  5. Step 5: Solve for x
    x = 8,873,364,675.98/129,795.31
  6. Step 6: Final answer
    x = 68,364.29

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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.