Home / 138,822.20-208,079.70-76,537.40

Finding the Fourth Proportional to 138,822.20, 208,079.70 and 76,537.40

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Solution

The fourth proportional to 138,822.20, 208,079.70 and 76,537.40 is: 114,721.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,822.20 : 208,079.70 = 76,537.40 : x
  2. Step 2: Convert to fraction form
    138,822.20/208,079.70 = 76,537.40/x
  3. Step 3: Cross multiply
    138,822.20x = 208,079.70 × 76,537.40
  4. Step 4: Simplify right side
    138,822.20x = 15,925,879,230.78
  5. Step 5: Solve for x
    x = 15,925,879,230.78/138,822.20
  6. Step 6: Final answer
    x = 114,721.42

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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.