Home / 205,899.40-308,849.10-72,778.60

Finding the Fourth Proportional to 205,899.40, 308,849.10 and 72,778.60

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Solution

The fourth proportional to 205,899.40, 308,849.10 and 72,778.60 is: 109,167.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,899.40 : 308,849.10 = 72,778.60 : x
  2. Step 2: Convert to fraction form
    205,899.40/308,849.10 = 72,778.60/x
  3. Step 3: Cross multiply
    205,899.40x = 308,849.10 × 72,778.60
  4. Step 4: Simplify right side
    205,899.40x = 22,477,605,109.26
  5. Step 5: Solve for x
    x = 22,477,605,109.26/205,899.40
  6. Step 6: Final answer
    x = 109,167.90

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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.