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Finding the Fourth Proportional to 255,788.20, 383,681.70 and 68,799.88

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Solution

The fourth proportional to 255,788.20, 383,681.70 and 68,799.88 is: 103,199.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,788.20 : 383,681.70 = 68,799.88 : x
  2. Step 2: Convert to fraction form
    255,788.20/383,681.70 = 68,799.88/x
  3. Step 3: Cross multiply
    255,788.20x = 383,681.70 × 68,799.88
  4. Step 4: Simplify right side
    255,788.20x = 26,397,254,918.20
  5. Step 5: Solve for x
    x = 26,397,254,918.20/255,788.20
  6. Step 6: Final answer
    x = 103,199.66

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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.