Home / 138,055.21-207,083.12-38,215.69

Finding the Fourth Proportional to 138,055.21, 207,083.12 and 38,215.69

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Solution

The fourth proportional to 138,055.21, 207,083.12 and 38,215.69 is: 57,323.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,055.21 : 207,083.12 = 38,215.69 : x
  2. Step 2: Convert to fraction form
    138,055.21/207,083.12 = 38,215.69/x
  3. Step 3: Cross multiply
    138,055.21x = 207,083.12 × 38,215.69
  4. Step 4: Simplify right side
    138,055.21x = 7,913,823,609.37
  5. Step 5: Solve for x
    x = 7,913,823,609.37/138,055.21
  6. Step 6: Final answer
    x = 57,323.62

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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.