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Finding the Fourth Proportional to 123,611.60, 185,611.80 and 71,123.60

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Solution

The fourth proportional to 123,611.60, 185,611.80 and 71,123.60 is: 106,797.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,611.60 : 185,611.80 = 71,123.60 : x
  2. Step 2: Convert to fraction form
    123,611.60/185,611.80 = 71,123.60/x
  3. Step 3: Cross multiply
    123,611.60x = 185,611.80 × 71,123.60
  4. Step 4: Simplify right side
    123,611.60x = 13,201,379,418.48
  5. Step 5: Solve for x
    x = 13,201,379,418.48/123,611.60
  6. Step 6: Final answer
    x = 106,797.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.