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Finding the Fourth Proportional to 111,269.70, 166,729.46 and 86,030.84

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Solution

The fourth proportional to 111,269.70, 166,729.46 and 86,030.84 is: 128,910.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,269.70 : 166,729.46 = 86,030.84 : x
  2. Step 2: Convert to fraction form
    111,269.70/166,729.46 = 86,030.84/x
  3. Step 3: Cross multiply
    111,269.70x = 166,729.46 × 86,030.84
  4. Step 4: Simplify right side
    111,269.70x = 14,343,875,483.22
  5. Step 5: Solve for x
    x = 14,343,875,483.22/111,269.70
  6. Step 6: Final answer
    x = 128,910.88

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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.