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Finding the Fourth Proportional to 255,093.70, 382,681.05 and 86,629.90

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Solution

The fourth proportional to 255,093.70, 382,681.05 and 86,629.90 is: 129,958.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,093.70 : 382,681.05 = 86,629.90 : x
  2. Step 2: Convert to fraction form
    255,093.70/382,681.05 = 86,629.90/x
  3. Step 3: Cross multiply
    255,093.70x = 382,681.05 × 86,629.90
  4. Step 4: Simplify right side
    255,093.70x = 33,151,621,093.40
  5. Step 5: Solve for x
    x = 33,151,621,093.40/255,093.70
  6. Step 6: Final answer
    x = 129,958.60

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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.