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Finding the Fourth Proportional to 100,342.44, 138,352.86 and 64,533.96

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Solution

The fourth proportional to 100,342.44, 138,352.86 and 64,533.96 is: 88,979.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,342.44 : 138,352.86 = 64,533.96 : x
  2. Step 2: Convert to fraction form
    100,342.44/138,352.86 = 64,533.96/x
  3. Step 3: Cross multiply
    100,342.44x = 138,352.86 × 64,533.96
  4. Step 4: Simplify right side
    100,342.44x = 8,928,457,933.13
  5. Step 5: Solve for x
    x = 8,928,457,933.13/100,342.44
  6. Step 6: Final answer
    x = 88,979.88

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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.