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Finding the Fourth Proportional to 170,751.87, 255,912.48 and 86,533.20

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Solution

The fourth proportional to 170,751.87, 255,912.48 and 86,533.20 is: 129,690.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,751.87 : 255,912.48 = 86,533.20 : x
  2. Step 2: Convert to fraction form
    170,751.87/255,912.48 = 86,533.20/x
  3. Step 3: Cross multiply
    170,751.87x = 255,912.48 × 86,533.20
  4. Step 4: Simplify right side
    170,751.87x = 22,144,925,814.34
  5. Step 5: Solve for x
    x = 22,144,925,814.34/170,751.87
  6. Step 6: Final answer
    x = 129,690.68

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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.