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Finding the Fourth Proportional to 71,622, 98,864.82 and 61,509.72

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Solution

The fourth proportional to 71,622, 98,864.82 and 61,509.72 is: 84,906.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,622 : 98,864.82 = 61,509.72 : x
  2. Step 2: Convert to fraction form
    71,622/98,864.82 = 61,509.72/x
  3. Step 3: Cross multiply
    71,622x = 98,864.82 × 61,509.72
  4. Step 4: Simplify right side
    71,622x = 6,081,147,396.05
  5. Step 5: Solve for x
    x = 6,081,147,396.05/71,622
  6. Step 6: Final answer
    x = 84,906.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.