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Finding the Fourth Proportional to 79,639.75, 109,905.44 and 45,654.68

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Solution

The fourth proportional to 79,639.75, 109,905.44 and 45,654.68 is: 63,004.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,639.75 : 109,905.44 = 45,654.68 : x
  2. Step 2: Convert to fraction form
    79,639.75/109,905.44 = 45,654.68/x
  3. Step 3: Cross multiply
    79,639.75x = 109,905.44 × 45,654.68
  4. Step 4: Simplify right side
    79,639.75x = 5,017,697,693.46
  5. Step 5: Solve for x
    x = 5,017,697,693.46/79,639.75
  6. Step 6: Final answer
    x = 63,004.94

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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.