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Finding the Fourth Proportional to 255,992.43, 383,994.17 and 78,495.51

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Solution

The fourth proportional to 255,992.43, 383,994.17 and 78,495.51 is: 117,744.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,992.43 : 383,994.17 = 78,495.51 : x
  2. Step 2: Convert to fraction form
    255,992.43/383,994.17 = 78,495.51/x
  3. Step 3: Cross multiply
    255,992.43x = 383,994.17 × 78,495.51
  4. Step 4: Simplify right side
    255,992.43x = 30,141,816,291.21
  5. Step 5: Solve for x
    x = 30,141,816,291.21/255,992.43
  6. Step 6: Final answer
    x = 117,744.95

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1.5x scale

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.