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Finding the Fourth Proportional to 111,916.80, 167,729.40 and 45,302.40

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Solution

The fourth proportional to 111,916.80, 167,729.40 and 45,302.40 is: 67,894.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,916.80 : 167,729.40 = 45,302.40 : x
  2. Step 2: Convert to fraction form
    111,916.80/167,729.40 = 45,302.40/x
  3. Step 3: Cross multiply
    111,916.80x = 167,729.40 × 45,302.40
  4. Step 4: Simplify right side
    111,916.80x = 7,598,544,370.56
  5. Step 5: Solve for x
    x = 7,598,544,370.56/111,916.80
  6. Step 6: Final answer
    x = 67,894.58

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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.