Home / 129,877.20-194,718.60-70,779.60

Finding the Fourth Proportional to 129,877.20, 194,718.60 and 70,779.60

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Solution

The fourth proportional to 129,877.20, 194,718.60 and 70,779.60 is: 106,116.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,877.20 : 194,718.60 = 70,779.60 : x
  2. Step 2: Convert to fraction form
    129,877.20/194,718.60 = 70,779.60/x
  3. Step 3: Cross multiply
    129,877.20x = 194,718.60 × 70,779.60
  4. Step 4: Simplify right side
    129,877.20x = 13,782,104,620.56
  5. Step 5: Solve for x
    x = 13,782,104,620.56/129,877.20
  6. Step 6: Final answer
    x = 106,116.43

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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.