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Finding the Fourth Proportional to 170,503.14, 255,912.45 and 86,322.45

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Solution

The fourth proportional to 170,503.14, 255,912.45 and 86,322.45 is: 129,563.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,503.14 : 255,912.45 = 86,322.45 : x
  2. Step 2: Convert to fraction form
    170,503.14/255,912.45 = 86,322.45/x
  3. Step 3: Cross multiply
    170,503.14x = 255,912.45 × 86,322.45
  4. Step 4: Simplify right side
    170,503.14x = 22,090,989,669.50
  5. Step 5: Solve for x
    x = 22,090,989,669.50/170,503.14
  6. Step 6: Final answer
    x = 129,563.54

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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.