Home / 71,968.78-99,316.92-40,137.00

Finding the Fourth Proportional to 71,968.78, 99,316.92 and 40,137.00

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Solution

The fourth proportional to 71,968.78, 99,316.92 and 40,137.00 is: 55,389.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,968.78 : 99,316.92 = 40,137.00 : x
  2. Step 2: Convert to fraction form
    71,968.78/99,316.92 = 40,137.00/x
  3. Step 3: Cross multiply
    71,968.78x = 99,316.92 × 40,137.00
  4. Step 4: Simplify right side
    71,968.78x = 3,986,282,996.12
  5. Step 5: Solve for x
    x = 3,986,282,996.12/71,968.78
  6. Step 6: Final answer
    x = 55,389.06

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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.