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Finding the Fourth Proportional to 120,710.50, 166,580.49 and 67,718.50

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Solution

The fourth proportional to 120,710.50, 166,580.49 and 67,718.50 is: 93,451.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,710.50 : 166,580.49 = 67,718.50 : x
  2. Step 2: Convert to fraction form
    120,710.50/166,580.49 = 67,718.50/x
  3. Step 3: Cross multiply
    120,710.50x = 166,580.49 × 67,718.50
  4. Step 4: Simplify right side
    120,710.50x = 11,280,580,912.07
  5. Step 5: Solve for x
    x = 11,280,580,912.07/120,710.50
  6. Step 6: Final answer
    x = 93,451.53

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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.