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Finding the Fourth Proportional to 159,178.56, 219,673.80 and 87,557.28

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Solution

The fourth proportional to 159,178.56, 219,673.80 and 87,557.28 is: 120,833.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,178.56 : 219,673.80 = 87,557.28 : x
  2. Step 2: Convert to fraction form
    159,178.56/219,673.80 = 87,557.28/x
  3. Step 3: Cross multiply
    159,178.56x = 219,673.80 × 87,557.28
  4. Step 4: Simplify right side
    159,178.56x = 19,234,040,415.26
  5. Step 5: Solve for x
    x = 19,234,040,415.26/159,178.56
  6. Step 6: Final answer
    x = 120,833.11

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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.