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Finding the Fourth Proportional to 159,521.86, 220,132.20 and 87,890.32

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Solution

The fourth proportional to 159,521.86, 220,132.20 and 87,890.32 is: 121,284.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,521.86 : 220,132.20 = 87,890.32 : x
  2. Step 2: Convert to fraction form
    159,521.86/220,132.20 = 87,890.32/x
  3. Step 3: Cross multiply
    159,521.86x = 220,132.20 × 87,890.32
  4. Step 4: Simplify right side
    159,521.86x = 19,347,489,500.30
  5. Step 5: Solve for x
    x = 19,347,489,500.30/159,521.86
  6. Step 6: Final answer
    x = 121,284.25

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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.