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Finding the Fourth Proportional to 79,643.28, 109,905.28 and 43,833.28

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Solution

The fourth proportional to 79,643.28, 109,905.28 and 43,833.28 is: 60,488.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,643.28 : 109,905.28 = 43,833.28 : x
  2. Step 2: Convert to fraction form
    79,643.28/109,905.28 = 43,833.28/x
  3. Step 3: Cross multiply
    79,643.28x = 109,905.28 × 43,833.28
  4. Step 4: Simplify right side
    79,643.28x = 4,817,508,911.72
  5. Step 5: Solve for x
    x = 4,817,508,911.72/79,643.28
  6. Step 6: Final answer
    x = 60,488.58

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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.