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Finding the Fourth Proportional to 120,989.87, 181,521.72 and 61,867.07

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Solution

The fourth proportional to 120,989.87, 181,521.72 and 61,867.07 is: 92,819.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,989.87 : 181,521.72 = 61,867.07 : x
  2. Step 2: Convert to fraction form
    120,989.87/181,521.72 = 61,867.07/x
  3. Step 3: Cross multiply
    120,989.87x = 181,521.72 × 61,867.07
  4. Step 4: Simplify right side
    120,989.87x = 11,230,216,050.15
  5. Step 5: Solve for x
    x = 11,230,216,050.15/120,989.87
  6. Step 6: Final answer
    x = 92,819.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.