Home / 129,645.10-194,139.60-123,740.20

Finding the Fourth Proportional to 129,645.10, 194,139.60 and 123,740.20

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Solution

The fourth proportional to 129,645.10, 194,139.60 and 123,740.20 is: 185,297.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,645.10 : 194,139.60 = 123,740.20 : x
  2. Step 2: Convert to fraction form
    129,645.10/194,139.60 = 123,740.20/x
  3. Step 3: Cross multiply
    129,645.10x = 194,139.60 × 123,740.20
  4. Step 4: Simplify right side
    129,645.10x = 24,022,872,931.92
  5. Step 5: Solve for x
    x = 24,022,872,931.92/129,645.10
  6. Step 6: Final answer
    x = 185,297.19

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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.