Home / 100,162.89-138,231.45-57,724.16

Finding the Fourth Proportional to 100,162.89, 138,231.45 and 57,724.16

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Solution

The fourth proportional to 100,162.89, 138,231.45 and 57,724.16 is: 79,663.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,162.89 : 138,231.45 = 57,724.16 : x
  2. Step 2: Convert to fraction form
    100,162.89/138,231.45 = 57,724.16/x
  3. Step 3: Cross multiply
    100,162.89x = 138,231.45 × 57,724.16
  4. Step 4: Simplify right side
    100,162.89x = 7,979,293,645.67
  5. Step 5: Solve for x
    x = 7,979,293,645.67/100,162.89
  6. Step 6: Final answer
    x = 79,663.17

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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.