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Finding the Fourth Proportional to 86,751.37, 129,978.41 and 58,234.95

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Solution

The fourth proportional to 86,751.37, 129,978.41 and 58,234.95 is: 87,252.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,751.37 : 129,978.41 = 58,234.95 : x
  2. Step 2: Convert to fraction form
    86,751.37/129,978.41 = 58,234.95/x
  3. Step 3: Cross multiply
    86,751.37x = 129,978.41 × 58,234.95
  4. Step 4: Simplify right side
    86,751.37x = 7,569,285,916.25
  5. Step 5: Solve for x
    x = 7,569,285,916.25/86,751.37
  6. Step 6: Final answer
    x = 87,252.64

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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.