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Finding the Fourth Proportional to 123,777.60, 170,813.28 and 67,188.96

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Solution

The fourth proportional to 123,777.60, 170,813.28 and 67,188.96 is: 92,720.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,777.60 : 170,813.28 = 67,188.96 : x
  2. Step 2: Convert to fraction form
    123,777.60/170,813.28 = 67,188.96/x
  3. Step 3: Cross multiply
    123,777.60x = 170,813.28 × 67,188.96
  4. Step 4: Simplify right side
    123,777.60x = 11,476,766,637.39
  5. Step 5: Solve for x
    x = 11,476,766,637.39/123,777.60
  6. Step 6: Final answer
    x = 92,720.87

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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.