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Finding the Fourth Proportional to 79,128.94, 109,197.75 and 43,318.94

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Solution

The fourth proportional to 79,128.94, 109,197.75 and 43,318.94 is: 59,780.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,128.94 : 109,197.75 = 43,318.94 : x
  2. Step 2: Convert to fraction form
    79,128.94/109,197.75 = 43,318.94/x
  3. Step 3: Cross multiply
    79,128.94x = 109,197.75 × 43,318.94
  4. Step 4: Simplify right side
    79,128.94x = 4,730,330,780.39
  5. Step 5: Solve for x
    x = 4,730,330,780.39/79,128.94
  6. Step 6: Final answer
    x = 59,780.03

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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.