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Finding the Fourth Proportional to 67,800.40, 101,725 and 23,431.64

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Solution

The fourth proportional to 67,800.40, 101,725 and 23,431.64 is: 35,155.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,800.40 : 101,725 = 23,431.64 : x
  2. Step 2: Convert to fraction form
    67,800.40/101,725 = 23,431.64/x
  3. Step 3: Cross multiply
    67,800.40x = 101,725 × 23,431.64
  4. Step 4: Simplify right side
    67,800.40x = 2,383,583,579
  5. Step 5: Solve for x
    x = 2,383,583,579/67,800.40
  6. Step 6: Final answer
    x = 35,155.89

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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.