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Finding the Fourth Proportional to 103,992.40, 155,729.40 and 83,256.40

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Solution

The fourth proportional to 103,992.40, 155,729.40 and 83,256.40 is: 124,677.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,992.40 : 155,729.40 = 83,256.40 : x
  2. Step 2: Convert to fraction form
    103,992.40/155,729.40 = 83,256.40/x
  3. Step 3: Cross multiply
    103,992.40x = 155,729.40 × 83,256.40
  4. Step 4: Simplify right side
    103,992.40x = 12,965,469,218.16
  5. Step 5: Solve for x
    x = 12,965,469,218.16/103,992.40
  6. Step 6: Final answer
    x = 124,677.08

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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.