Home / 205,090.90-307,490.55-78,682.30

Finding the Fourth Proportional to 205,090.90, 307,490.55 and 78,682.30

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Solution

The fourth proportional to 205,090.90, 307,490.55 and 78,682.30 is: 117,967.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,090.90 : 307,490.55 = 78,682.30 : x
  2. Step 2: Convert to fraction form
    205,090.90/307,490.55 = 78,682.30/x
  3. Step 3: Cross multiply
    205,090.90x = 307,490.55 × 78,682.30
  4. Step 4: Simplify right side
    205,090.90x = 24,194,063,702.27
  5. Step 5: Solve for x
    x = 24,194,063,702.27/205,090.90
  6. Step 6: Final answer
    x = 117,967.51

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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.