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Finding the Fourth Proportional to 86,874.54, 130,175.73 and 69,339.66

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Solution

The fourth proportional to 86,874.54, 130,175.73 and 69,339.66 is: 103,900.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,874.54 : 130,175.73 = 69,339.66 : x
  2. Step 2: Convert to fraction form
    86,874.54/130,175.73 = 69,339.66/x
  3. Step 3: Cross multiply
    86,874.54x = 130,175.73 × 69,339.66
  4. Step 4: Simplify right side
    86,874.54x = 9,026,340,858.45
  5. Step 5: Solve for x
    x = 9,026,340,858.45/86,874.54
  6. Step 6: Final answer
    x = 103,900.88

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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.