Home / 256,489.10-384,775.00-78,996.05

Finding the Fourth Proportional to 256,489.10, 384,775.00 and 78,996.05

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Solution

The fourth proportional to 256,489.10, 384,775.00 and 78,996.05 is: 118,506.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,489.10 : 384,775.00 = 78,996.05 : x
  2. Step 2: Convert to fraction form
    256,489.10/384,775.00 = 78,996.05/x
  3. Step 3: Cross multiply
    256,489.10x = 384,775.00 × 78,996.05
  4. Step 4: Simplify right side
    256,489.10x = 30,395,703,017.38
  5. Step 5: Solve for x
    x = 30,395,703,017.38/256,489.10
  6. Step 6: Final answer
    x = 118,506.80

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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.