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Finding the Fourth Proportional to 73,316.36, 109,980.95 and 20,725.86

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Solution

The fourth proportional to 73,316.36, 109,980.95 and 20,725.86 is: 31,090.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,316.36 : 109,980.95 = 20,725.86 : x
  2. Step 2: Convert to fraction form
    73,316.36/109,980.95 = 20,725.86/x
  3. Step 3: Cross multiply
    73,316.36x = 109,980.95 × 20,725.86
  4. Step 4: Simplify right side
    73,316.36x = 2,279,449,772.37
  5. Step 5: Solve for x
    x = 2,279,449,772.37/73,316.36
  6. Step 6: Final answer
    x = 31,090.60

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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.