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Finding the Fourth Proportional to 154,679.86, 213,458.61 and 87,611.86

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Solution

The fourth proportional to 154,679.86, 213,458.61 and 87,611.86 is: 120,904.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,679.86 : 213,458.61 = 87,611.86 : x
  2. Step 2: Convert to fraction form
    154,679.86/213,458.61 = 87,611.86/x
  3. Step 3: Cross multiply
    154,679.86x = 213,458.61 × 87,611.86
  4. Step 4: Simplify right side
    154,679.86x = 18,701,505,855.11
  5. Step 5: Solve for x
    x = 18,701,505,855.11/154,679.86
  6. Step 6: Final answer
    x = 120,904.60

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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.