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Finding the Fourth Proportional to 103,615.87, 155,218.03 and 79,840.93

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Solution

The fourth proportional to 103,615.87, 155,218.03 and 79,840.93 is: 119,602.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,615.87 : 155,218.03 = 79,840.93 : x
  2. Step 2: Convert to fraction form
    103,615.87/155,218.03 = 79,840.93/x
  3. Step 3: Cross multiply
    103,615.87x = 155,218.03 × 79,840.93
  4. Step 4: Simplify right side
    103,615.87x = 12,392,751,867.97
  5. Step 5: Solve for x
    x = 12,392,751,867.97/103,615.87
  6. Step 6: Final answer
    x = 119,602.84

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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.