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Finding the Fourth Proportional to 98,398.08, 135,788.80 and 55,956.64

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Solution

The fourth proportional to 98,398.08, 135,788.80 and 55,956.64 is: 77,219.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,398.08 : 135,788.80 = 55,956.64 : x
  2. Step 2: Convert to fraction form
    98,398.08/135,788.80 = 55,956.64/x
  3. Step 3: Cross multiply
    98,398.08x = 135,788.80 × 55,956.64
  4. Step 4: Simplify right side
    98,398.08x = 7,598,284,997.63
  5. Step 5: Solve for x
    x = 7,598,284,997.63/98,398.08
  6. Step 6: Final answer
    x = 77,219.85

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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.