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Finding the Fourth Proportional to 208,859.80, 313,386.90 and 109,132.60

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Solution

The fourth proportional to 208,859.80, 313,386.90 and 109,132.60 is: 163,749.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,859.80 : 313,386.90 = 109,132.60 : x
  2. Step 2: Convert to fraction form
    208,859.80/313,386.90 = 109,132.60/x
  3. Step 3: Cross multiply
    208,859.80x = 313,386.90 × 109,132.60
  4. Step 4: Simplify right side
    208,859.80x = 34,200,727,202.94
  5. Step 5: Solve for x
    x = 34,200,727,202.94/208,859.80
  6. Step 6: Final answer
    x = 163,749.69

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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.