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Finding the Fourth Proportional to 61,313.24, 84,651 and 40,128.32

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Solution

The fourth proportional to 61,313.24, 84,651 and 40,128.32 is: 55,402.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,313.24 : 84,651 = 40,128.32 : x
  2. Step 2: Convert to fraction form
    61,313.24/84,651 = 40,128.32/x
  3. Step 3: Cross multiply
    61,313.24x = 84,651 × 40,128.32
  4. Step 4: Simplify right side
    61,313.24x = 3,396,902,416.32
  5. Step 5: Solve for x
    x = 3,396,902,416.32/61,313.24
  6. Step 6: Final answer
    x = 55,402.43

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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.