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Finding the Fourth Proportional to 79,689.45, 109,972.18 and 43,880.28

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Solution

The fourth proportional to 79,689.45, 109,972.18 and 43,880.28 is: 60,555.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,689.45 : 109,972.18 = 43,880.28 : x
  2. Step 2: Convert to fraction form
    79,689.45/109,972.18 = 43,880.28/x
  3. Step 3: Cross multiply
    79,689.45x = 109,972.18 × 43,880.28
  4. Step 4: Simplify right side
    79,689.45x = 4,825,610,050.61
  5. Step 5: Solve for x
    x = 4,825,610,050.61/79,689.45
  6. Step 6: Final answer
    x = 60,555.19

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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.