Home / 138,863.19-208,417.83-71,442.81

Finding the Fourth Proportional to 138,863.19, 208,417.83 and 71,442.81

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Solution

The fourth proportional to 138,863.19, 208,417.83 and 71,442.81 is: 107,227.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,863.19 : 208,417.83 = 71,442.81 : x
  2. Step 2: Convert to fraction form
    138,863.19/208,417.83 = 71,442.81/x
  3. Step 3: Cross multiply
    138,863.19x = 208,417.83 × 71,442.81
  4. Step 4: Simplify right side
    138,863.19x = 14,889,955,161.39
  5. Step 5: Solve for x
    x = 14,889,955,161.39/138,863.19
  6. Step 6: Final answer
    x = 107,227.51

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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.