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Finding the Fourth Proportional to 159,606.68, 220,256.42 and 87,986.61

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Solution

The fourth proportional to 159,606.68, 220,256.42 and 87,986.61 is: 121,421.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,606.68 : 220,256.42 = 87,986.61 : x
  2. Step 2: Convert to fraction form
    159,606.68/220,256.42 = 87,986.61/x
  3. Step 3: Cross multiply
    159,606.68x = 220,256.42 × 87,986.61
  4. Step 4: Simplify right side
    159,606.68x = 19,379,615,286.60
  5. Step 5: Solve for x
    x = 19,379,615,286.60/159,606.68
  6. Step 6: Final answer
    x = 121,421.08

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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.