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Finding the Fourth Proportional to 204,987.30, 307,538.55 and 99,809.70

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Solution

The fourth proportional to 204,987.30, 307,538.55 and 99,809.70 is: 149,742.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,987.30 : 307,538.55 = 99,809.70 : x
  2. Step 2: Convert to fraction form
    204,987.30/307,538.55 = 99,809.70/x
  3. Step 3: Cross multiply
    204,987.30x = 307,538.55 × 99,809.70
  4. Step 4: Simplify right side
    204,987.30x = 30,695,330,413.94
  5. Step 5: Solve for x
    x = 30,695,330,413.94/204,987.30
  6. Step 6: Final answer
    x = 149,742.60

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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.