Home / 138,991.69-208,718.17-86,733.32

Finding the Fourth Proportional to 138,991.69, 208,718.17 and 86,733.32

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Solution

The fourth proportional to 138,991.69, 208,718.17 and 86,733.32 is: 130,243.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,991.69 : 208,718.17 = 86,733.32 : x
  2. Step 2: Convert to fraction form
    138,991.69/208,718.17 = 86,733.32/x
  3. Step 3: Cross multiply
    138,991.69x = 208,718.17 × 86,733.32
  4. Step 4: Simplify right side
    138,991.69x = 18,102,819,828.42
  5. Step 5: Solve for x
    x = 18,102,819,828.42/138,991.69
  6. Step 6: Final answer
    x = 130,243.90

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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.