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Finding the Fourth Proportional to 159,605.54, 220,255.59 and 87,986.78

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Solution

The fourth proportional to 159,605.54, 220,255.59 and 87,986.78 is: 121,421.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,605.54 : 220,255.59 = 87,986.78 : x
  2. Step 2: Convert to fraction form
    159,605.54/220,255.59 = 87,986.78/x
  3. Step 3: Cross multiply
    159,605.54x = 220,255.59 × 87,986.78
  4. Step 4: Simplify right side
    159,605.54x = 19,379,580,141.10
  5. Step 5: Solve for x
    x = 19,379,580,141.10/159,605.54
  6. Step 6: Final answer
    x = 121,421.73

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1.5x scale

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.