Home / 66,639.36-99,974.85-19,891.02

Finding the Fourth Proportional to 66,639.36, 99,974.85 and 19,891.02

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Solution

The fourth proportional to 66,639.36, 99,974.85 and 19,891.02 is: 29,841.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,639.36 : 99,974.85 = 19,891.02 : x
  2. Step 2: Convert to fraction form
    66,639.36/99,974.85 = 19,891.02/x
  3. Step 3: Cross multiply
    66,639.36x = 99,974.85 × 19,891.02
  4. Step 4: Simplify right side
    66,639.36x = 1,988,601,740.85
  5. Step 5: Solve for x
    x = 1,988,601,740.85/66,639.36
  6. Step 6: Final answer
    x = 29,841.25

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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.