Home / 154,079.40-231,119.10-71,135.40

Finding the Fourth Proportional to 154,079.40, 231,119.10 and 71,135.40

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Solution

The fourth proportional to 154,079.40, 231,119.10 and 71,135.40 is: 106,703.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,079.40 : 231,119.10 = 71,135.40 : x
  2. Step 2: Convert to fraction form
    154,079.40/231,119.10 = 71,135.40/x
  3. Step 3: Cross multiply
    154,079.40x = 231,119.10 × 71,135.40
  4. Step 4: Simplify right side
    154,079.40x = 16,440,749,626.14
  5. Step 5: Solve for x
    x = 16,440,749,626.14/154,079.40
  6. Step 6: Final answer
    x = 106,703.10

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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.