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Finding the Fourth Proportional to 121,508.82, 167,681.94 and 67,790.64

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Solution

The fourth proportional to 121,508.82, 167,681.94 and 67,790.64 is: 93,550.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,508.82 : 167,681.94 = 67,790.64 : x
  2. Step 2: Convert to fraction form
    121,508.82/167,681.94 = 67,790.64/x
  3. Step 3: Cross multiply
    121,508.82x = 167,681.94 × 67,790.64
  4. Step 4: Simplify right side
    121,508.82x = 11,367,266,029.04
  5. Step 5: Solve for x
    x = 11,367,266,029.04/121,508.82
  6. Step 6: Final answer
    x = 93,550.95

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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.