Home / 254,579.40-381,350.70-129,990.60

Finding the Fourth Proportional to 254,579.40, 381,350.70 and 129,990.60

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Solution

The fourth proportional to 254,579.40, 381,350.70 and 129,990.60 is: 194,721.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,579.40 : 381,350.70 = 129,990.60 : x
  2. Step 2: Convert to fraction form
    254,579.40/381,350.70 = 129,990.60/x
  3. Step 3: Cross multiply
    254,579.40x = 381,350.70 × 129,990.60
  4. Step 4: Simplify right side
    254,579.40x = 49,572,006,303.42
  5. Step 5: Solve for x
    x = 49,572,006,303.42/254,579.40
  6. Step 6: Final answer
    x = 194,721.20

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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.