Home / 86,744.20-129,857.10-51,665.80

Finding the Fourth Proportional to 86,744.20, 129,857.10 and 51,665.80

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Solution

The fourth proportional to 86,744.20, 129,857.10 and 51,665.80 is: 77,344.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,744.20 : 129,857.10 = 51,665.80 : x
  2. Step 2: Convert to fraction form
    86,744.20/129,857.10 = 51,665.80/x
  3. Step 3: Cross multiply
    86,744.20x = 129,857.10 × 51,665.80
  4. Step 4: Simplify right side
    86,744.20x = 6,709,170,957.18
  5. Step 5: Solve for x
    x = 6,709,170,957.18/86,744.20
  6. Step 6: Final answer
    x = 77,344.32

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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.