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Finding the Fourth Proportional to 111,368.13, 166,972.83 and 52,171.53

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Solution

The fourth proportional to 111,368.13, 166,972.83 and 52,171.53 is: 78,220.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,368.13 : 166,972.83 = 52,171.53 : x
  2. Step 2: Convert to fraction form
    111,368.13/166,972.83 = 52,171.53/x
  3. Step 3: Cross multiply
    111,368.13x = 166,972.83 × 52,171.53
  4. Step 4: Simplify right side
    111,368.13x = 8,711,228,009.53
  5. Step 5: Solve for x
    x = 8,711,228,009.53/111,368.13
  6. Step 6: Final answer
    x = 78,220.12

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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.