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Finding the Fourth Proportional to 159,109.08, 219,571.32 and 87,493.72

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Solution

The fourth proportional to 159,109.08, 219,571.32 and 87,493.72 is: 120,741.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,109.08 : 219,571.32 = 87,493.72 : x
  2. Step 2: Convert to fraction form
    159,109.08/219,571.32 = 87,493.72/x
  3. Step 3: Cross multiply
    159,109.08x = 219,571.32 × 87,493.72
  4. Step 4: Simplify right side
    159,109.08x = 19,211,111,592.11
  5. Step 5: Solve for x
    x = 19,211,111,592.11/159,109.08
  6. Step 6: Final answer
    x = 120,741.77

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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.