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Finding the Fourth Proportional to 159,172.55, 219,656.96 and 87,551.03

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Solution

The fourth proportional to 159,172.55, 219,656.96 and 87,551.03 is: 120,819.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,172.55 : 219,656.96 = 87,551.03 : x
  2. Step 2: Convert to fraction form
    159,172.55/219,656.96 = 87,551.03/x
  3. Step 3: Cross multiply
    159,172.55x = 219,656.96 × 87,551.03
  4. Step 4: Simplify right side
    159,172.55x = 19,231,191,558.63
  5. Step 5: Solve for x
    x = 19,231,191,558.63/159,172.55
  6. Step 6: Final answer
    x = 120,819.78

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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.