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Finding the Fourth Proportional to 78,440.60, 108,208.16 and 51,232.62

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Solution

The fourth proportional to 78,440.60, 108,208.16 and 51,232.62 is: 70,674.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,440.60 : 108,208.16 = 51,232.62 : x
  2. Step 2: Convert to fraction form
    78,440.60/108,208.16 = 51,232.62/x
  3. Step 3: Cross multiply
    78,440.60x = 108,208.16 × 51,232.62
  4. Step 4: Simplify right side
    78,440.60x = 5,543,787,286.02
  5. Step 5: Solve for x
    x = 5,543,787,286.02/78,440.60
  6. Step 6: Final answer
    x = 70,674.98

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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.