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Finding the Fourth Proportional to 98,399.32, 135,789.36 and 55,956.88

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Solution

The fourth proportional to 98,399.32, 135,789.36 and 55,956.88 is: 77,219.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,399.32 : 135,789.36 = 55,956.88 : x
  2. Step 2: Convert to fraction form
    98,399.32/135,789.36 = 55,956.88/x
  3. Step 3: Cross multiply
    98,399.32x = 135,789.36 × 55,956.88
  4. Step 4: Simplify right side
    98,399.32x = 7,598,348,922.80
  5. Step 5: Solve for x
    x = 7,598,348,922.80/98,399.32
  6. Step 6: Final answer
    x = 77,219.53

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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.