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Finding the Fourth Proportional to 66,330.51, 99,500.66 and 18,949.61

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Solution

The fourth proportional to 66,330.51, 99,500.66 and 18,949.61 is: 28,425.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,330.51 : 99,500.66 = 18,949.61 : x
  2. Step 2: Convert to fraction form
    66,330.51/99,500.66 = 18,949.61/x
  3. Step 3: Cross multiply
    66,330.51x = 99,500.66 × 18,949.61
  4. Step 4: Simplify right side
    66,330.51x = 1,885,498,997.87
  5. Step 5: Solve for x
    x = 1,885,498,997.87/66,330.51
  6. Step 6: Final answer
    x = 28,425.82

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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.