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Finding the Fourth Proportional to 208,078.22, 287,149.28 and 122,019.68

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Solution

The fourth proportional to 208,078.22, 287,149.28 and 122,019.68 is: 168,387.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,078.22 : 287,149.28 = 122,019.68 : x
  2. Step 2: Convert to fraction form
    208,078.22/287,149.28 = 122,019.68/x
  3. Step 3: Cross multiply
    208,078.22x = 287,149.28 × 122,019.68
  4. Step 4: Simplify right side
    208,078.22x = 35,037,863,257.83
  5. Step 5: Solve for x
    x = 35,037,863,257.83/208,078.22
  6. Step 6: Final answer
    x = 168,387.94

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1.5x scale

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.