Home / 129,638.10-194,675.85-85,460.70

Finding the Fourth Proportional to 129,638.10, 194,675.85 and 85,460.70

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Solution

The fourth proportional to 129,638.10, 194,675.85 and 85,460.70 is: 128,335.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,638.10 : 194,675.85 = 85,460.70 : x
  2. Step 2: Convert to fraction form
    129,638.10/194,675.85 = 85,460.70/x
  3. Step 3: Cross multiply
    129,638.10x = 194,675.85 × 85,460.70
  4. Step 4: Simplify right side
    129,638.10x = 16,637,134,414.10
  5. Step 5: Solve for x
    x = 16,637,134,414.10/129,638.10
  6. Step 6: Final answer
    x = 128,335.22

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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.