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Finding the Fourth Proportional to 128,984.80, 193,390.80 and 62,456.80

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Solution

The fourth proportional to 128,984.80, 193,390.80 and 62,456.80 is: 93,643.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,984.80 : 193,390.80 = 62,456.80 : x
  2. Step 2: Convert to fraction form
    128,984.80/193,390.80 = 62,456.80/x
  3. Step 3: Cross multiply
    128,984.80x = 193,390.80 × 62,456.80
  4. Step 4: Simplify right side
    128,984.80x = 12,078,570,517.44
  5. Step 5: Solve for x
    x = 12,078,570,517.44/128,984.80
  6. Step 6: Final answer
    x = 93,643.36

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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.