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Finding the Fourth Proportional to 128,248.40, 192,375.90 and 60,764.60

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Solution

The fourth proportional to 128,248.40, 192,375.90 and 60,764.60 is: 91,148.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,248.40 : 192,375.90 = 60,764.60 : x
  2. Step 2: Convert to fraction form
    128,248.40/192,375.90 = 60,764.60/x
  3. Step 3: Cross multiply
    128,248.40x = 192,375.90 × 60,764.60
  4. Step 4: Simplify right side
    128,248.40x = 11,689,643,651.26
  5. Step 5: Solve for x
    x = 11,689,643,651.26/128,248.40
  6. Step 6: Final answer
    x = 91,148.46

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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.