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Finding the Fourth Proportional to 78,724.62, 108,636 and 44,728.68

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Solution

The fourth proportional to 78,724.62, 108,636 and 44,728.68 is: 61,723.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,724.62 : 108,636 = 44,728.68 : x
  2. Step 2: Convert to fraction form
    78,724.62/108,636 = 44,728.68/x
  3. Step 3: Cross multiply
    78,724.62x = 108,636 × 44,728.68
  4. Step 4: Simplify right side
    78,724.62x = 4,859,144,880.48
  5. Step 5: Solve for x
    x = 4,859,144,880.48/78,724.62
  6. Step 6: Final answer
    x = 61,723.32

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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.