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Finding the Fourth Proportional to 257,566.80, 386,350.20 and 68,026.80

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Solution

The fourth proportional to 257,566.80, 386,350.20 and 68,026.80 is: 102,040.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,566.80 : 386,350.20 = 68,026.80 : x
  2. Step 2: Convert to fraction form
    257,566.80/386,350.20 = 68,026.80/x
  3. Step 3: Cross multiply
    257,566.80x = 386,350.20 × 68,026.80
  4. Step 4: Simplify right side
    257,566.80x = 26,282,167,785.36
  5. Step 5: Solve for x
    x = 26,282,167,785.36/257,566.80
  6. Step 6: Final answer
    x = 102,040.20

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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.