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Finding the Fourth Proportional to 72,455.88, 108,156.03 and 67,113.54

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Solution

The fourth proportional to 72,455.88, 108,156.03 and 67,113.54 is: 100,181.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,455.88 : 108,156.03 = 67,113.54 : x
  2. Step 2: Convert to fraction form
    72,455.88/108,156.03 = 67,113.54/x
  3. Step 3: Cross multiply
    72,455.88x = 108,156.03 × 67,113.54
  4. Step 4: Simplify right side
    72,455.88x = 7,258,733,710.08
  5. Step 5: Solve for x
    x = 7,258,733,710.08/72,455.88
  6. Step 6: Final answer
    x = 100,181.43

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.