Home / 131,724.80-181,815.36-81,395.36

Finding the Fourth Proportional to 131,724.80, 181,815.36 and 81,395.36

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Solution

The fourth proportional to 131,724.80, 181,815.36 and 81,395.36 is: 112,347.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,724.80 : 181,815.36 = 81,395.36 : x
  2. Step 2: Convert to fraction form
    131,724.80/181,815.36 = 81,395.36/x
  3. Step 3: Cross multiply
    131,724.80x = 181,815.36 × 81,395.36
  4. Step 4: Simplify right side
    131,724.80x = 14,798,926,680.73
  5. Step 5: Solve for x
    x = 14,798,926,680.73/131,724.80
  6. Step 6: Final answer
    x = 112,347.31

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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.