Home / 257,181.98-385,632.03-79,639.70

Finding the Fourth Proportional to 257,181.98, 385,632.03 and 79,639.70

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Solution

The fourth proportional to 257,181.98, 385,632.03 and 79,639.70 is: 119,415.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,181.98 : 385,632.03 = 79,639.70 : x
  2. Step 2: Convert to fraction form
    257,181.98/385,632.03 = 79,639.70/x
  3. Step 3: Cross multiply
    257,181.98x = 385,632.03 × 79,639.70
  4. Step 4: Simplify right side
    257,181.98x = 30,711,619,179.59
  5. Step 5: Solve for x
    x = 30,711,619,179.59/257,181.98
  6. Step 6: Final answer
    x = 119,415.91

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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.