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Finding the Fourth Proportional to 132,867.12, 198,865.44 and 72,804

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Solution

The fourth proportional to 132,867.12, 198,865.44 and 72,804 is: 108,967.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,867.12 : 198,865.44 = 72,804 : x
  2. Step 2: Convert to fraction form
    132,867.12/198,865.44 = 72,804/x
  3. Step 3: Cross multiply
    132,867.12x = 198,865.44 × 72,804
  4. Step 4: Simplify right side
    132,867.12x = 14,478,199,493.76
  5. Step 5: Solve for x
    x = 14,478,199,493.76/132,867.12
  6. Step 6: Final answer
    x = 108,967.51

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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.