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Finding the Fourth Proportional to 137,360.90, 205,672.21 and 87,169.25

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Solution

The fourth proportional to 137,360.90, 205,672.21 and 87,169.25 is: 130,519.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,360.90 : 205,672.21 = 87,169.25 : x
  2. Step 2: Convert to fraction form
    137,360.90/205,672.21 = 87,169.25/x
  3. Step 3: Cross multiply
    137,360.90x = 205,672.21 × 87,169.25
  4. Step 4: Simplify right side
    137,360.90x = 17,928,291,045.26
  5. Step 5: Solve for x
    x = 17,928,291,045.26/137,360.90
  6. Step 6: Final answer
    x = 130,519.61

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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.