Home / 71,918.20-99,248.42-40,083.68

Finding the Fourth Proportional to 71,918.20, 99,248.42 and 40,083.68

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Solution

The fourth proportional to 71,918.20, 99,248.42 and 40,083.68 is: 55,316.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,918.20 : 99,248.42 = 40,083.68 : x
  2. Step 2: Convert to fraction form
    71,918.20/99,248.42 = 40,083.68/x
  3. Step 3: Cross multiply
    71,918.20x = 99,248.42 × 40,083.68
  4. Step 4: Simplify right side
    71,918.20x = 3,978,242,256.12
  5. Step 5: Solve for x
    x = 3,978,242,256.12/71,918.20
  6. Step 6: Final answer
    x = 55,316.21

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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.