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Finding the Fourth Proportional to 159,556.66, 220,184.40 and 86,961.85

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Solution

The fourth proportional to 159,556.66, 220,184.40 and 86,961.85 is: 120,005.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,556.66 : 220,184.40 = 86,961.85 : x
  2. Step 2: Convert to fraction form
    159,556.66/220,184.40 = 86,961.85/x
  3. Step 3: Cross multiply
    159,556.66x = 220,184.40 × 86,961.85
  4. Step 4: Simplify right side
    159,556.66x = 19,147,641,888.57
  5. Step 5: Solve for x
    x = 19,147,641,888.57/159,556.66
  6. Step 6: Final answer
    x = 120,005.28

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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.