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Finding the Fourth Proportional to 66,459.45, 99,694.57 and 19,712.19

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Solution

The fourth proportional to 66,459.45, 99,694.57 and 19,712.19 is: 29,569.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,459.45 : 99,694.57 = 19,712.19 : x
  2. Step 2: Convert to fraction form
    66,459.45/99,694.57 = 19,712.19/x
  3. Step 3: Cross multiply
    66,459.45x = 99,694.57 × 19,712.19
  4. Step 4: Simplify right side
    66,459.45x = 1,965,198,305.81
  5. Step 5: Solve for x
    x = 1,965,198,305.81/66,459.45
  6. Step 6: Final answer
    x = 29,569.89

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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.