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Finding the Fourth Proportional to 86,144.79, 128,940.72 and 46,063.66

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Solution

The fourth proportional to 86,144.79, 128,940.72 and 46,063.66 is: 68,947.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,144.79 : 128,940.72 = 46,063.66 : x
  2. Step 2: Convert to fraction form
    86,144.79/128,940.72 = 46,063.66/x
  3. Step 3: Cross multiply
    86,144.79x = 128,940.72 × 46,063.66
  4. Step 4: Simplify right side
    86,144.79x = 5,939,481,486.24
  5. Step 5: Solve for x
    x = 5,939,481,486.24/86,144.79
  6. Step 6: Final answer
    x = 68,947.66

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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.