Home / 133,139.10-199,611.45-54,212.70

Finding the Fourth Proportional to 133,139.10, 199,611.45 and 54,212.70

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Solution

The fourth proportional to 133,139.10, 199,611.45 and 54,212.70 is: 81,279.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,139.10 : 199,611.45 = 54,212.70 : x
  2. Step 2: Convert to fraction form
    133,139.10/199,611.45 = 54,212.70/x
  3. Step 3: Cross multiply
    133,139.10x = 199,611.45 × 54,212.70
  4. Step 4: Simplify right side
    133,139.10x = 10,821,475,655.42
  5. Step 5: Solve for x
    x = 10,821,475,655.42/133,139.10
  6. Step 6: Final answer
    x = 81,279.47

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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.