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Finding the Fourth Proportional to 123,679.50, 170,677.80 and 67,091.10

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Solution

The fourth proportional to 123,679.50, 170,677.80 and 67,091.10 is: 92,585.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,679.50 : 170,677.80 = 67,091.10 : x
  2. Step 2: Convert to fraction form
    123,679.50/170,677.80 = 67,091.10/x
  3. Step 3: Cross multiply
    123,679.50x = 170,677.80 × 67,091.10
  4. Step 4: Simplify right side
    123,679.50x = 11,450,961,347.58
  5. Step 5: Solve for x
    x = 11,450,961,347.58/123,679.50
  6. Step 6: Final answer
    x = 92,585.77

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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.