Home / 129,740.10-194,610.15-85,416.90

Finding the Fourth Proportional to 129,740.10, 194,610.15 and 85,416.90

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Solution

The fourth proportional to 129,740.10, 194,610.15 and 85,416.90 is: 128,125.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,740.10 : 194,610.15 = 85,416.90 : x
  2. Step 2: Convert to fraction form
    129,740.10/194,610.15 = 85,416.90/x
  3. Step 3: Cross multiply
    129,740.10x = 194,610.15 × 85,416.90
  4. Step 4: Simplify right side
    129,740.10x = 16,622,995,721.54
  5. Step 5: Solve for x
    x = 16,622,995,721.54/129,740.10
  6. Step 6: Final answer
    x = 128,125.35

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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.