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Finding the Fourth Proportional to 78,372.37, 108,186.96 and 52,913.20

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Solution

The fourth proportional to 78,372.37, 108,186.96 and 52,913.20 is: 73,042.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,372.37 : 108,186.96 = 52,913.20 : x
  2. Step 2: Convert to fraction form
    78,372.37/108,186.96 = 52,913.20/x
  3. Step 3: Cross multiply
    78,372.37x = 108,186.96 × 52,913.20
  4. Step 4: Simplify right side
    78,372.37x = 5,724,518,251.87
  5. Step 5: Solve for x
    x = 5,724,518,251.87/78,372.37
  6. Step 6: Final answer
    x = 73,042.56

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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.