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Finding the Fourth Proportional to 111,316.86, 166,984.80 and 61,431.39

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Solution

The fourth proportional to 111,316.86, 166,984.80 and 61,431.39 is: 92,152.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,316.86 : 166,984.80 = 61,431.39 : x
  2. Step 2: Convert to fraction form
    111,316.86/166,984.80 = 61,431.39/x
  3. Step 3: Cross multiply
    111,316.86x = 166,984.80 × 61,431.39
  4. Step 4: Simplify right side
    111,316.86x = 10,258,108,372.87
  5. Step 5: Solve for x
    x = 10,258,108,372.87/111,316.86
  6. Step 6: Final answer
    x = 92,152.33

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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.