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Finding the Fourth Proportional to 79,639.76, 109,905.08 and 43,341.54

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Solution

The fourth proportional to 79,639.76, 109,905.08 and 43,341.54 is: 59,812.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,639.76 : 109,905.08 = 43,341.54 : x
  2. Step 2: Convert to fraction form
    79,639.76/109,905.08 = 43,341.54/x
  3. Step 3: Cross multiply
    79,639.76x = 109,905.08 × 43,341.54
  4. Step 4: Simplify right side
    79,639.76x = 4,763,455,366.85
  5. Step 5: Solve for x
    x = 4,763,455,366.85/79,639.76
  6. Step 6: Final answer
    x = 59,812.53

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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.