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Finding the Fourth Proportional to 208,720, 288,033.60 and 119,297.92

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Solution

The fourth proportional to 208,720, 288,033.60 and 119,297.92 is: 164,631.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,720 : 288,033.60 = 119,297.92 : x
  2. Step 2: Convert to fraction form
    208,720/288,033.60 = 119,297.92/x
  3. Step 3: Cross multiply
    208,720x = 288,033.60 × 119,297.92
  4. Step 4: Simplify right side
    208,720x = 34,361,809,370.11
  5. Step 5: Solve for x
    x = 34,361,809,370.11/208,720
  6. Step 6: Final answer
    x = 164,631.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.