Home / 129,788.60-194,682.90-85,465.40

Finding the Fourth Proportional to 129,788.60, 194,682.90 and 85,465.40

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Solution

The fourth proportional to 129,788.60, 194,682.90 and 85,465.40 is: 128,198.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,788.60 : 194,682.90 = 85,465.40 : x
  2. Step 2: Convert to fraction form
    129,788.60/194,682.90 = 85,465.40/x
  3. Step 3: Cross multiply
    129,788.60x = 194,682.90 × 85,465.40
  4. Step 4: Simplify right side
    129,788.60x = 16,638,651,921.66
  5. Step 5: Solve for x
    x = 16,638,651,921.66/129,788.60
  6. Step 6: Final answer
    x = 128,198.10

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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.