Home / 138,488.15-208,121.74-82,338.35

Finding the Fourth Proportional to 138,488.15, 208,121.74 and 82,338.35

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Solution

The fourth proportional to 138,488.15, 208,121.74 and 82,338.35 is: 123,739.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,488.15 : 208,121.74 = 82,338.35 : x
  2. Step 2: Convert to fraction form
    138,488.15/208,121.74 = 82,338.35/x
  3. Step 3: Cross multiply
    138,488.15x = 208,121.74 × 82,338.35
  4. Step 4: Simplify right side
    138,488.15x = 17,136,399,424.27
  5. Step 5: Solve for x
    x = 17,136,399,424.27/138,488.15
  6. Step 6: Final answer
    x = 123,739.10

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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.