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Finding the Fourth Proportional to 255,087.70, 382,672.05 and 86,623.90

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Solution

The fourth proportional to 255,087.70, 382,672.05 and 86,623.90 is: 129,949.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,087.70 : 382,672.05 = 86,623.90 : x
  2. Step 2: Convert to fraction form
    255,087.70/382,672.05 = 86,623.90/x
  3. Step 3: Cross multiply
    255,087.70x = 382,672.05 × 86,623.90
  4. Step 4: Simplify right side
    255,087.70x = 33,148,545,392.00
  5. Step 5: Solve for x
    x = 33,148,545,392.00/255,087.70
  6. Step 6: Final answer
    x = 129,949.60

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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.