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Finding the Fourth Proportional to 69,978.64, 96,572.32 and 43,138.88

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Solution

The fourth proportional to 69,978.64, 96,572.32 and 43,138.88 is: 59,532.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,978.64 : 96,572.32 = 43,138.88 : x
  2. Step 2: Convert to fraction form
    69,978.64/96,572.32 = 43,138.88/x
  3. Step 3: Cross multiply
    69,978.64x = 96,572.32 × 43,138.88
  4. Step 4: Simplify right side
    69,978.64x = 4,166,021,723.80
  5. Step 5: Solve for x
    x = 4,166,021,723.80/69,978.64
  6. Step 6: Final answer
    x = 59,532.76

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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.