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Finding the Fourth Proportional to 121,605.84, 167,816.21 and 67,890.83

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Solution

The fourth proportional to 121,605.84, 167,816.21 and 67,890.83 is: 93,689.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,605.84 : 167,816.21 = 67,890.83 : x
  2. Step 2: Convert to fraction form
    121,605.84/167,816.21 = 67,890.83/x
  3. Step 3: Cross multiply
    121,605.84x = 167,816.21 × 67,890.83
  4. Step 4: Simplify right side
    121,605.84x = 11,393,180,605.82
  5. Step 5: Solve for x
    x = 11,393,180,605.82/121,605.84
  6. Step 6: Final answer
    x = 93,689.42

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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.