Home / 257,553.09-386,321.40-68,007.60

Finding the Fourth Proportional to 257,553.09, 386,321.40 and 68,007.60

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Solution

The fourth proportional to 257,553.09, 386,321.40 and 68,007.60 is: 102,009.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,553.09 : 386,321.40 = 68,007.60 : x
  2. Step 2: Convert to fraction form
    257,553.09/386,321.40 = 68,007.60/x
  3. Step 3: Cross multiply
    257,553.09x = 386,321.40 × 68,007.60
  4. Step 4: Simplify right side
    257,553.09x = 26,272,791,242.64
  5. Step 5: Solve for x
    x = 26,272,791,242.64/257,553.09
  6. Step 6: Final answer
    x = 102,009.23

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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.