Home / 100,664.80-138,914.44-57,642.88

Finding the Fourth Proportional to 100,664.80, 138,914.44 and 57,642.88

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Solution

The fourth proportional to 100,664.80, 138,914.44 and 57,642.88 is: 79,545.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,664.80 : 138,914.44 = 57,642.88 : x
  2. Step 2: Convert to fraction form
    100,664.80/138,914.44 = 57,642.88/x
  3. Step 3: Cross multiply
    100,664.80x = 138,914.44 × 57,642.88
  4. Step 4: Simplify right side
    100,664.80x = 8,007,428,395.19
  5. Step 5: Solve for x
    x = 8,007,428,395.19/100,664.80
  6. Step 6: Final answer
    x = 79,545.47

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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.